Crypto primitives removed from ethkey (#11174)

* Crypto utils removed from ethkey * Fix ethkey lib * Switch ethsore to new crypto * Accounts crate fixed * Secret store crate switched to new crypto * Ethcore builtin fixed * Accounts crate fixed * Ethcore crate fixed * Util network fixed * Util network-devp2p fixed * Private tx fixed * Ethcore sync fixed * Secret store fixed * Rpc fixed * Parity fixed * Ethkey cli fixed * Local store fixed * Ethcore blockchain fixed * Cargo.lock pushed; doc comment added for reversed nonce * Ethstore tests fixed * Ethstore cli fixed * Miner fixed * Snapshot tests are fixed * Single brackets removed * Machine fixed * Verification fixed * Executive state fixed * More single brackets removed * Update version of parity-crypto * Use published version 0.4.2 of parity-crypto * New test in tx_filter fixed
2019-10-23 13:03:46 +02:00 · 2019-10-23 13:03:46 +02:00 · 834585d61b
commit 834585d61b
parent 81ca599f2a
176 changed files with 579 additions and 2376 deletions
--- a/Cargo.lock
+++ b/Cargo.lock
@ -130,6 +130,11 @@ dependencies = [
 "nodrop 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 [[package]]
 name = "arrayvec"
 version = "0.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 [[package]]
 name = "ascii"
 version = "0.7.1"
@ -174,7 +179,6 @@ dependencies = [
 "ethcore-io 1.12.0",
 "ethereum-types 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "ethjson 0.1.0",
 "ethkey 0.3.0",
 "itertools 0.5.10 (registry+https://github.com/rust-lang/crates.io-index)",
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 "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
@ -182,6 +186,7 @@ dependencies = [
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 "machine 0.1.0",
 "macros 0.1.0",
 "parity-crypto 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
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@ -203,7 +208,7 @@ version = "0.3.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
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- "cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
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 "rustc-demangle 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
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@ -214,7 +219,7 @@ name = "backtrace-sys"
 version = "0.1.24"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "cc 1.0.28 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cc 1.0.46 (registry+https://github.com/rust-lang/crates.io-index)",
 "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@ -251,10 +256,10 @@ dependencies = [
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 "ethereum-types 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "ethjson 0.1.0",
 "ethkey 0.3.0",
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 "parity-crypto 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
 "parking_lot 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
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 "spec 0.1.0",
@ -440,7 +445,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 [[package]]
 name = "cc"
-version = "1.0.28"
+version = "1.0.46"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 [[package]]
@ -450,7 +455,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 [[package]]
 name = "cfg-if"
-version = "0.1.9"
+version = "0.1.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 [[package]]
@ -535,13 +540,13 @@ dependencies = [
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 "ethereum-types 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "ethjson 0.1.0",
 "ethkey 0.3.0",
 "keccak-hash 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
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 "rlp 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
@ -564,7 +569,7 @@ name = "cmake"
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 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "cc 1.0.28 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cc 1.0.46 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 [[package]]
@ -588,9 +593,9 @@ dependencies = [
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 "ethereum-types 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "ethjson 0.1.0",
 "ethkey 0.3.0",
 "keccak-hash 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "parity-bytes 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "parity-crypto 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
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 "parity-util-mem 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "patricia-trie-ethereum 0.1.0",
@ -658,7 +663,7 @@ version = "0.7.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
 "arrayvec 0.4.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
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@ -683,7 +688,7 @@ name = "crossbeam-utils"
 version = "0.6.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
 "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@ -878,10 +883,11 @@ dependencies = [
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 "ethcore-builtin 0.1.0",
 "ethereum-types 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "ethkey 0.3.0",
+ "ethkey 0.4.0",
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 "machine 0.1.0",
 "parity-bytes 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
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 ]
@ -925,17 +931,6 @@ dependencies = [
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 ]
 [[package]]
 name = "eth-secp256k1"
 version = "0.5.7"
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 [[package]]
 name = "ethabi"
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@ -1044,7 +1039,6 @@ dependencies = [
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 "ethkey 0.3.0",
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 "fetch 0.1.0",
@ -1062,6 +1056,7 @@ dependencies = [
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@ -1097,9 +1092,10 @@ name = "ethcore-accounts"
 version = "0.1.0"
 dependencies = [
 "ethereum-types 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "ethkey 0.3.0",
+ "ethkey 0.4.0",
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@ -1117,13 +1113,13 @@ dependencies = [
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@ -1153,13 +1149,12 @@ dependencies = [
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- "parity-crypto 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "parity-crypto 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 [[package]]
@ -1278,13 +1273,13 @@ dependencies = [
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@ -1308,11 +1303,10 @@ dependencies = [
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@ -1331,7 +1325,6 @@ dependencies = [
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@ -1340,7 +1333,7 @@ dependencies = [
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@ -1373,7 +1366,6 @@ dependencies = [
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@ -1384,7 +1376,7 @@ dependencies = [
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@ -1422,7 +1414,7 @@ dependencies = [
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@ -1432,7 +1424,7 @@ dependencies = [
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@ -1503,7 +1495,6 @@ dependencies = [
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@ -1551,22 +1543,14 @@ dependencies = [
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@ -1575,8 +1559,9 @@ version = "0.1.0"
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@ -1590,12 +1575,12 @@ version = "0.2.1"
 dependencies = [
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@ -1616,9 +1601,11 @@ dependencies = [
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@ -5515,7 +5515,6 @@ dependencies = [
 "checksum memoffset 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "ce6075db033bbbb7ee5a0bbd3a3186bbae616f57fb001c485c7ff77955f8177f"
 "checksum memory-db 0.15.0 (registry+https://github.com/rust-lang/crates.io-index)" = "a688133a81c915553c1dd9c3e859949f43a854cb8f8773e690e849b53b1f89f0"
 "checksum memory_units 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "71d96e3f3c0b6325d8ccd83c33b28acb183edcb6c67938ba104ec546854b0882"
 "checksum memzero 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "93c0d11ac30a033511ae414355d80f70d9f29a44a49140face477117a1ee90db"
 "checksum mime 0.3.12 (registry+https://github.com/rust-lang/crates.io-index)" = "0a907b83e7b9e987032439a387e187119cddafc92d5c2aaeb1d92580a793f630"
 "checksum mime_guess 2.0.0-alpha.6 (registry+https://github.com/rust-lang/crates.io-index)" = "30de2e4613efcba1ec63d8133f344076952090c122992a903359be5a4f99c3ed"
 "checksum mio 0.6.19 (registry+https://github.com/rust-lang/crates.io-index)" = "83f51996a3ed004ef184e16818edc51fadffe8e7ca68be67f9dee67d84d0ff23"
@ -5543,12 +5542,13 @@ dependencies = [
 "checksum ordermap 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)" = "a86ed3f5f244b372d6b1a00b72ef7f8876d0bc6a78a4c9985c53614041512063"
 "checksum owning_ref 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "cdf84f41639e037b484f93433aa3897863b561ed65c6e59c7073d7c561710f37"
 "checksum parity-bytes 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "fa5168b4cf41f3835e4bc6ffb32f51bc9365dc50cb351904595b3931d917fd0c"
-"checksum parity-crypto 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ded773d0b20caeb099708dcfddf85d75d34ecdba80fcdb573a69af334535d51d"
+"checksum parity-crypto 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)" = "27a9c2b525c93d717a234eb220c26474f8d97b08ac50d79faeac4cb6c74bf0b9"
 "checksum parity-daemonize 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "69b1910b2793ff52713fca0a4ee92544ebec59ccd218ea74560be6f947b4ca77"
 "checksum parity-path 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "5962540f99d3895d9addf535f37ab1397886bc2c68e59efd040ef458e5f8c3f7"
 "checksum parity-rocksdb 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "2d17caf6640e24b70242f3f48615e3f0764f98871e8c7aea25584e29833eb5a8"
 "checksum parity-rocksdb-sys 0.5.6 (registry+https://github.com/rust-lang/crates.io-index)" = "9581e6b8c63f3808500638372ee56faaaffb57c4d349974bff591606b94d5f57"
 "checksum parity-scale-codec 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)" = "65582b5c02128a4b0fa60fb3e070216e9c84be3e4a8f1b74bc37e15a25e58daf"
 "checksum parity-secp256k1 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "4fca4f82fccae37e8bbdaeb949a4a218a1bbc485d11598f193d2a908042e5fc1"
 "checksum parity-snappy 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "e2c5f9d149b13134b8b354d93a92830efcbee6fe5b73a2e6e540fe70d4dd8a63"
 "checksum parity-snappy-sys 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "1a413d51e5e1927320c9de992998e4a279dffb8c8a7363570198bd8383e66f1b"
 "checksum parity-tokio-ipc 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "8281bf4f1d6429573f89589bf68d89451c46750977a8264f8ea3edbabeba7947"
@ -5741,5 +5741,5 @@ dependencies = [
 "checksum xdg 2.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "a66b7c2281ebde13cf4391d70d4c7e5946c3c25e72a7b859ca8f677dcd0b0c61"
 "checksum xml-rs 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "3c1cb601d29fe2c2ac60a2b2e5e293994d87a1f6fa9687a31a15270f909be9c2"
 "checksum xmltree 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ff8eaee9d17062850f1e6163b509947969242990ee59a35801af437abe041e70"
-"checksum zeroize 0.9.1 (registry+https://github.com/rust-lang/crates.io-index)" = "5e2ea4afc22e9497e26b42bf047083c30f7e3ca566f3bcd7187f83d18b327043"
+"checksum zeroize 0.9.3 (registry+https://github.com/rust-lang/crates.io-index)" = "45af6a010d13e4cf5b54c94ba5a2b2eba5596b9e46bf5875612d332a1f2b3f86"
-"checksum zeroize_derive 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "afd1469e4bbca3b96606d26ba6e9bd6d3aed3b1299c82b92ec94377d22d78dbc"
+"checksum zeroize_derive 0.9.3 (registry+https://github.com/rust-lang/crates.io-index)" = "080616bd0e31f36095288bb0acdf1f78ef02c2fa15527d7e993f2a6c7591643e"
--- a/Cargo.toml
+++ b/Cargo.toml
@ -48,6 +48,7 @@ num_cpus = "1.2"
 number_prefix = "0.2"
 panic_hook = { path = "util/panic-hook" }
 parity-bytes = "0.1"
 parity-crypto = { version = "0.4.2", features = ["publickey"] }
 parity-daemonize = "0.3"
 parity-hash-fetch = { path = "updater/hash-fetch" }
 parity-ipfs-api = { path = "ipfs" }
--- a/accounts/Cargo.toml
+++ b/accounts/Cargo.toml
@ -11,6 +11,7 @@ edition = "2018"
 ethkey = { path = "ethkey" }
 ethstore = { path = "ethstore" }
 log = "0.4"
 parity-crypto = { version = "0.4.2", features = ["publickey"] }
 parking_lot = "0.9"
 serde = "1.0"
 serde_derive = "1.0"
--- a/accounts/ethkey/Cargo.toml
+++ b/accounts/ethkey/Cargo.toml
@ -1,21 +1,13 @@
 [package]
 description = "Parity Ethereum Keys Generator"
 name = "ethkey"
-version = "0.3.0"
+version = "0.4.0"
 authors = ["Parity Technologies <admin@parity.io>"]
 [dependencies]
 edit-distance = "2.0"
 parity-crypto = "0.4.0"
 eth-secp256k1 = { git = "https://github.com/paritytech/rust-secp256k1" }
 ethereum-types = "0.8.0"
 lazy_static = "1.0"
 log = "0.4"
 parity-wordlist = "1.3"
 quick-error = "1.2.2"
 rand = "0.7"
 rustc-hex = "1.0"
 serde = "1.0"
 serde_derive = "1.0"
-tiny-keccak = "1.4"
+parity-crypto = { version = "0.4.2", features = ["publickey"] }
-zeroize = "0.9.1"
+parity-wordlist = "1.3"
--- a/accounts/ethkey/cli/Cargo.toml
+++ b/accounts/ethkey/cli/Cargo.toml
@ -9,6 +9,7 @@ docopt = "1.0"
 env_logger = "0.5"
 ethkey = { path = "../" }
 panic_hook = { path = "../../../util/panic-hook" }
 parity-crypto = { version = "0.4.2", features = ["publickey"] }
 parity-wordlist="1.2"
 rustc-hex = "1.0"
 serde = "1.0"
--- a/accounts/ethkey/cli/src/main.rs
+++ b/accounts/ethkey/cli/src/main.rs
@ -19,6 +19,7 @@ extern crate env_logger;
 extern crate ethkey;
 extern crate panic_hook;
 extern crate parity_wordlist;
 extern crate parity_crypto;
 extern crate rustc_hex;
 extern crate serde;
 extern crate threadpool;
@ -30,7 +31,8 @@ use std::num::ParseIntError;
 use std::{env, fmt, process, io, sync};
 use docopt::Docopt;
-use ethkey::{KeyPair, Random, Brain, BrainPrefix, Prefix, Error as EthkeyError, Generator, sign, verify_public, verify_address, brain_recover};
+use ethkey::{Brain, BrainPrefix, Prefix, brain_recover};
 use parity_crypto::publickey::{KeyPair, Random, Error as EthkeyError, Generator, sign, verify_public, verify_address};
 use rustc_hex::{FromHex, FromHexError};
 const USAGE: &'static str = r#"
@ -200,7 +202,7 @@ fn execute<S, I>(command: I) -> Result<String, Error> where I: IntoIterator<Item
 			let keypair = Brain::new(phrase).generate().expect("Brain wallet generator is infallible; qed");
 			(keypair, Some(phrase_info))
 		} else {
-			let secret = args.arg_secret_or_phrase.parse().map_err(|_| EthkeyError::InvalidSecret)?;
+			let secret = args.arg_secret_or_phrase.parse().map_err(|_| EthkeyError::InvalidSecretKey)?;
 			(KeyPair::from_secret(secret)?, None)
 		};
 		Ok(display(result, display_mode))
@ -241,7 +243,7 @@ fn execute<S, I>(command: I) -> Result<String, Error> where I: IntoIterator<Item
 		};
 		Ok(display(result, display_mode))
 	} else if args.cmd_sign {
-		let secret = args.arg_secret.parse().map_err(|_| EthkeyError::InvalidSecret)?;
+		let secret = args.arg_secret.parse().map_err(|_| EthkeyError::InvalidSecretKey)?;
 		let message = args.arg_message.parse().map_err(|_| EthkeyError::InvalidMessage)?;
 		let signature = sign(&secret, &message)?;
 		Ok(format!("{}", signature))
@ -249,7 +251,7 @@ fn execute<S, I>(command: I) -> Result<String, Error> where I: IntoIterator<Item
 		let signature = args.arg_signature.parse().map_err(|_| EthkeyError::InvalidSignature)?;
 		let message = args.arg_message.parse().map_err(|_| EthkeyError::InvalidMessage)?;
 		let ok = if args.cmd_public {
-			let public = args.arg_public.parse().map_err(|_| EthkeyError::InvalidPublic)?;
+			let public = args.arg_public.parse().map_err(|_| EthkeyError::InvalidPublicKey)?;
 			verify_public(&public, &signature, &message)?
 		} else if args.cmd_address {
 			let address = args.arg_address.parse().map_err(|_| EthkeyError::InvalidAddress)?;
--- a/accounts/ethkey/src/brain.rs
+++ b/accounts/ethkey/src/brain.rs
@ -14,8 +14,9 @@
 // You should have received a copy of the GNU General Public License
 // along with Parity Ethereum.  If not, see <http://www.gnu.org/licenses/>.
-use keccak::Keccak256;
+use std::convert::Infallible;
-use super::{KeyPair, Generator, Secret};
+use parity_crypto::publickey::{KeyPair, Generator, Secret};
 use parity_crypto::Keccak256;
 use parity_wordlist;
 /// Simple brainwallet.
@ -32,7 +33,7 @@ impl Brain {
 }
 impl Generator for Brain {
-    type Error = ::Void;
+	type Error = Infallible;
 	fn generate(&mut self) -> Result<KeyPair, Self::Error> {
 		let seed = self.0.clone();
@ -45,7 +46,7 @@ impl Generator for Brain {
 			match i > 16384 {
 				false => i += 1,
 				true => {
-					if let Ok(pair) = Secret::from_unsafe_slice(&secret)
+					if let Ok(pair) = Secret::import_key(&secret)
 						.and_then(KeyPair::from_secret)
 					{
 						if pair.address()[0] == 0 {
@ -61,7 +62,8 @@ impl Generator for Brain {
 #[cfg(test)]
 mod tests {
-	use {Brain, Generator};
+	use Brain;
 	use parity_crypto::publickey::Generator;
 	#[test]
 	fn test_brain() {
--- a/accounts/ethkey/src/brain_prefix.rs
+++ b/accounts/ethkey/src/brain_prefix.rs
@ -14,7 +14,8 @@
 // You should have received a copy of the GNU General Public License
 // along with Parity Ethereum.  If not, see <http://www.gnu.org/licenses/>.
-use super::{Generator, KeyPair, Error, Brain};
+use super::Brain;
 use parity_crypto::publickey::{Generator, KeyPair, Error};
 use parity_wordlist as wordlist;
 /// Tries to find brain-seed keypair with address starting with given prefix.
@ -59,7 +60,8 @@ impl Generator for BrainPrefix {
 #[cfg(test)]
 mod tests {
-	use {Generator, BrainPrefix};
+	use BrainPrefix;
 	use parity_crypto::publickey::Generator;
 	#[test]
 	fn prefix_generator() {
--- a/accounts/ethkey/src/brain_recover.rs
+++ b/accounts/ethkey/src/brain_recover.rs
@ -19,7 +19,8 @@ use std::collections::HashSet;
 use edit_distance::edit_distance;
 use parity_wordlist;
-use super::{Address, Brain, Generator};
+use super::Brain;
 use parity_crypto::publickey::{Address, Generator};
 /// Tries to find a phrase for address, given the number
 /// of expected words and a partial phrase.
--- a/accounts/ethkey/src/crypto.rs
+++ b/accounts/ethkey/src/crypto.rs
@ -1,189 +0,0 @@
 // Copyright 2015-2019 Parity Technologies (UK) Ltd.
 // This file is part of Parity Ethereum.
 // Parity Ethereum is free software: you can redistribute it and/or modify
 // it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 // Parity Ethereum is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 // GNU General Public License for more details.
 // You should have received a copy of the GNU General Public License
 // along with Parity Ethereum.  If not, see <http://www.gnu.org/licenses/>.
 use secp256k1;
 use std::io;
 use parity_crypto::error::SymmError;
 quick_error! {
 	#[derive(Debug)]
 	pub enum Error {
 		Secp(e: secp256k1::Error) {
 			display("secp256k1 error: {}", e)
 			cause(e)
 			from()
 		}
 		Io(e: io::Error) {
 			display("i/o error: {}", e)
 			cause(e)
 			from()
 		}
 		InvalidMessage {
 			display("invalid message")
 		}
 		Symm(e: SymmError) {
 			cause(e)
 			from()
 		}
 	}
 }
 /// ECDH functions
 pub mod ecdh {
 	use secp256k1::{self, ecdh, key};
 	use super::Error;
 	use {Secret, Public, SECP256K1};
 	/// Agree on a shared secret
 	pub fn agree(secret: &Secret, public: &Public) -> Result<Secret, Error> {
 		let context = &SECP256K1;
 		let pdata = {
 			let mut temp = [4u8; 65];
 			(&mut temp[1..65]).copy_from_slice(&public[0..64]);
 			temp
 		};
 		let publ = key::PublicKey::from_slice(context, &pdata)?;
 		let sec = key::SecretKey::from_slice(context, secret.as_bytes())?;
 		let shared = ecdh::SharedSecret::new_raw(context, &publ, &sec);
 		Secret::from_unsafe_slice(&shared[0..32])
 			.map_err(|_| Error::Secp(secp256k1::Error::InvalidSecretKey))
 	}
 }
 /// ECIES function
 pub mod ecies {
 	use parity_crypto::{aes, digest, hmac, is_equal};
 	use ethereum_types::H128;
 	use super::{ecdh, Error};
 	use {Random, Generator, Public, Secret};
 	/// Encrypt a message with a public key, writing an HMAC covering both
 	/// the plaintext and authenticated data.
 	///
 	/// Authenticated data may be empty.
 	pub fn encrypt(public: &Public, auth_data: &[u8], plain: &[u8]) -> Result<Vec<u8>, Error> {
 		let r = Random.generate()?;
 		let z = ecdh::agree(r.secret(), public)?;
 		let mut key = [0u8; 32];
 		kdf(&z, &[0u8; 0], &mut key);
 		let ekey = &key[0..16];
 		let mkey = hmac::SigKey::sha256(&digest::sha256(&key[16..32]));
 		let mut msg = vec![0u8; 1 + 64 + 16 + plain.len() + 32];
 		msg[0] = 0x04u8;
 		{
 			let msgd = &mut msg[1..];
 			msgd[0..64].copy_from_slice(r.public().as_bytes());
 			let iv = H128::random();
 			msgd[64..80].copy_from_slice(iv.as_bytes());
 			{
 				let cipher = &mut msgd[(64 + 16)..(64 + 16 + plain.len())];
 				aes::encrypt_128_ctr(ekey, iv.as_bytes(), plain, cipher)?;
 			}
 			let mut hmac = hmac::Signer::with(&mkey);
 			{
 				let cipher_iv = &msgd[64..(64 + 16 + plain.len())];
 				hmac.update(cipher_iv);
 			}
 			hmac.update(auth_data);
 			let sig = hmac.sign();
 			msgd[(64 + 16 + plain.len())..].copy_from_slice(&sig);
 		}
 		Ok(msg)
 	}
 	/// Decrypt a message with a secret key, checking HMAC for ciphertext
 	/// and authenticated data validity.
 	pub fn decrypt(secret: &Secret, auth_data: &[u8], encrypted: &[u8]) -> Result<Vec<u8>, Error> {
 		let meta_len = 1 + 64 + 16 + 32;
 		if encrypted.len() < meta_len  || encrypted[0] < 2 || encrypted[0] > 4 {
 			return Err(Error::InvalidMessage); //invalid message: publickey
 		}
 		let e = &encrypted[1..];
 		let p = Public::from_slice(&e[0..64]);
 		let z = ecdh::agree(secret, &p)?;
 		let mut key = [0u8; 32];
 		kdf(&z, &[0u8; 0], &mut key);
 		let ekey = &key[0..16];
 		let mkey = hmac::SigKey::sha256(&digest::sha256(&key[16..32]));
 		let clen = encrypted.len() - meta_len;
 		let cipher_with_iv = &e[64..(64+16+clen)];
 		let cipher_iv = &cipher_with_iv[0..16];
 		let cipher_no_iv = &cipher_with_iv[16..];
 		let msg_mac = &e[(64+16+clen)..];
 		// Verify tag
 		let mut hmac = hmac::Signer::with(&mkey);
 		hmac.update(cipher_with_iv);
 		hmac.update(auth_data);
 		let mac = hmac.sign();
 		if !is_equal(&mac.as_ref()[..], msg_mac) {
 			return Err(Error::InvalidMessage);
 		}
 		let mut msg = vec![0u8; clen];
 		aes::decrypt_128_ctr(ekey, cipher_iv, cipher_no_iv, &mut msg[..])?;
 		Ok(msg)
 	}
 	fn kdf(secret: &Secret, s1: &[u8], dest: &mut [u8]) {
 		// SEC/ISO/Shoup specify counter size SHOULD be equivalent
 		// to size of hash output, however, it also notes that
 		// the 4 bytes is okay. NIST specifies 4 bytes.
 		let mut ctr = 1u32;
 		let mut written = 0usize;
 		while written < dest.len() {
 			let mut hasher = digest::Hasher::sha256();
 			let ctrs = [(ctr >> 24) as u8, (ctr >> 16) as u8, (ctr >> 8) as u8, ctr as u8];
 			hasher.update(&ctrs);
 			hasher.update(secret.as_bytes());
 			hasher.update(s1);
 			let d = hasher.finish();
 			&mut dest[written..(written + 32)].copy_from_slice(&d);
 			written += 32;
 			ctr += 1;
 		}
 	}
 }
 #[cfg(test)]
 mod tests {
 	use super::ecies;
 	use {Random, Generator};
 	#[test]
 	fn ecies_shared() {
 		let kp = Random.generate().unwrap();
 		let message = b"So many books, so little time";
 		let shared = b"shared";
 		let wrong_shared = b"incorrect";
 		let encrypted = ecies::encrypt(kp.public(), shared, message).unwrap();
 		assert!(encrypted[..] != message[..]);
 		assert_eq!(encrypted[0], 0x04);
 		assert!(ecies::decrypt(kp.secret(), wrong_shared, &encrypted).is_err());
 		let decrypted = ecies::decrypt(kp.secret(), shared, &encrypted).unwrap();
 		assert_eq!(decrypted[..message.len()], message[..]);
 	}
 }
--- a/accounts/ethkey/src/error.rs
+++ b/accounts/ethkey/src/error.rs
@ -1,81 +0,0 @@
 // Copyright 2015-2019 Parity Technologies (UK) Ltd.
 // This file is part of Parity Ethereum.
 // Parity Ethereum is free software: you can redistribute it and/or modify
 // it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 // Parity Ethereum is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 // GNU General Public License for more details.
 // You should have received a copy of the GNU General Public License
 // along with Parity Ethereum.  If not, see <http://www.gnu.org/licenses/>.
 use std::{fmt, error};
 #[derive(Debug)]
 /// Crypto error
 pub enum Error {
 	/// Invalid secret key
 	InvalidSecret,
 	/// Invalid public key
 	InvalidPublic,
 	/// Invalid address
 	InvalidAddress,
 	/// Invalid EC signature
 	InvalidSignature,
 	/// Invalid AES message
 	InvalidMessage,
 	/// IO Error
 	Io(::std::io::Error),
 	/// Custom
 	Custom(String),
 }
 impl fmt::Display for Error {
 	fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
 		let msg = match *self {
 			Error::InvalidSecret => "Invalid secret".into(),
 			Error::InvalidPublic => "Invalid public".into(),
 			Error::InvalidAddress => "Invalid address".into(),
 			Error::InvalidSignature => "Invalid EC signature".into(),
 			Error::InvalidMessage => "Invalid AES message".into(),
 			Error::Io(ref err) => format!("I/O error: {}", err),
 			Error::Custom(ref s) => s.clone(),
 		};
 		f.write_fmt(format_args!("Crypto error ({})", msg))
 	}
 }
 impl error::Error for Error {
 	fn description(&self) -> &str {
 		"Crypto error"
 	}
 }
 impl Into<String> for Error {
 	fn into(self) -> String {
 		format!("{}", self)
 	}
 }
 impl From<::secp256k1::Error> for Error {
 	fn from(e: ::secp256k1::Error) -> Error {
 		match e {
 			::secp256k1::Error::InvalidMessage => Error::InvalidMessage,
 			::secp256k1::Error::InvalidPublicKey => Error::InvalidPublic,
 			::secp256k1::Error::InvalidSecretKey => Error::InvalidSecret,
 			_ => Error::InvalidSignature,
 		}
 	}
 }
 impl From<::std::io::Error> for Error {
 	fn from(err: ::std::io::Error) -> Error {
 		Error::Io(err)
 	}
 }
--- a/accounts/ethkey/src/extended.rs
+++ b/accounts/ethkey/src/extended.rs
@ -1,517 +0,0 @@
 // Copyright 2015-2019 Parity Technologies (UK) Ltd.
 // This file is part of Parity Ethereum.
 // Parity Ethereum is free software: you can redistribute it and/or modify
 // it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 // Parity Ethereum is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 // GNU General Public License for more details.
 // You should have received a copy of the GNU General Public License
 // along with Parity Ethereum.  If not, see <http://www.gnu.org/licenses/>.
 //! Extended keys
 use secret::Secret;
 use Public;
 use ethereum_types::H256;
 pub use self::derivation::Error as DerivationError;
 /// Represents label that can be stored as a part of key derivation
 pub trait Label {
 	/// Length of the data that label occupies
 	fn len() -> usize;
 	/// Store label data to the key derivation sequence
 	/// Must not use more than `len()` bytes from slice
 	fn store(&self, target: &mut [u8]);
 }
 impl Label for u32 {
 	fn len() -> usize { 4 }
 	fn store(&self, target: &mut [u8]) {
 		let bytes = self.to_be_bytes();
 		target[0..4].copy_from_slice(&bytes);
 	}
 }
 /// Key derivation over generic label `T`
 pub enum Derivation<T: Label> {
 	/// Soft key derivation (allow proof of parent)
 	Soft(T),
 	/// Hard key derivation (does not allow proof of parent)
 	Hard(T),
 }
 impl From<u32> for Derivation<u32> {
 	fn from(index: u32) -> Self {
 		if index < (2 << 30) {
 			Derivation::Soft(index)
 		}
 		else {
 			Derivation::Hard(index)
 		}
 	}
 }
 impl Label for H256 {
 	fn len() -> usize { 32 }
 	fn store(&self, target: &mut [u8]) {
 		(&mut target[0..32]).copy_from_slice(self.as_bytes());
 	}
 }
 /// Extended secret key, allows deterministic derivation of subsequent keys.
 pub struct ExtendedSecret {
 	secret: Secret,
 	chain_code: H256,
 }
 impl ExtendedSecret {
 	/// New extended key from given secret and chain code.
 	pub fn with_code(secret: Secret, chain_code: H256) -> ExtendedSecret {
 		ExtendedSecret {
 			secret: secret,
 			chain_code: chain_code,
 		}
 	}
 	/// New extended key from given secret with the random chain code.
 	pub fn new_random(secret: Secret) -> ExtendedSecret {
 		ExtendedSecret::with_code(secret, H256::random())
 	}
 	/// New extended key from given secret.
 	/// Chain code will be derived from the secret itself (in a deterministic way).
 	pub fn new(secret: Secret) -> ExtendedSecret {
 		let chain_code = derivation::chain_code(*secret);
 		ExtendedSecret::with_code(secret, chain_code)
 	}
 	/// Derive new private key
 	pub fn derive<T>(&self, index: Derivation<T>) -> ExtendedSecret where T: Label {
 		let (derived_key, next_chain_code) = derivation::private(*self.secret, self.chain_code, index);
 		let derived_secret = Secret::from(derived_key.0);
 		ExtendedSecret::with_code(derived_secret, next_chain_code)
 	}
 	/// Private key component of the extended key.
 	pub fn as_raw(&self) -> &Secret {
 		&self.secret
 	}
 }
 /// Extended public key, allows deterministic derivation of subsequent keys.
 pub struct ExtendedPublic {
 	public: Public,
 	chain_code: H256,
 }
 impl ExtendedPublic {
 	/// New extended public key from known parent and chain code
 	pub fn new(public: Public, chain_code: H256) -> Self {
 		ExtendedPublic { public: public, chain_code: chain_code }
 	}
 	/// Create new extended public key from known secret
 	pub fn from_secret(secret: &ExtendedSecret) -> Result<Self, DerivationError> {
 		Ok(
 			ExtendedPublic::new(
 				derivation::point(**secret.as_raw())?,
 				secret.chain_code.clone(),
 			)
 		)
 	}
 	/// Derive new public key
 	/// Operation is defined only for index belongs [0..2^31)
 	pub fn derive<T>(&self, index: Derivation<T>) -> Result<Self, DerivationError> where T: Label {
 		let (derived_key, next_chain_code) = derivation::public(self.public, self.chain_code, index)?;
 		Ok(ExtendedPublic::new(derived_key, next_chain_code))
 	}
 	pub fn public(&self) -> &Public {
 		&self.public
 	}
 }
 pub struct ExtendedKeyPair {
 	secret: ExtendedSecret,
 	public: ExtendedPublic,
 }
 impl ExtendedKeyPair {
 	pub fn new(secret: Secret) -> Self {
 		let extended_secret = ExtendedSecret::new(secret);
 		let extended_public = ExtendedPublic::from_secret(&extended_secret)
 			.expect("Valid `Secret` always produces valid public; qed");
 		ExtendedKeyPair {
 			secret: extended_secret,
 			public: extended_public,
 		}
 	}
 	pub fn with_code(secret: Secret, public: Public, chain_code: H256) -> Self {
 		ExtendedKeyPair {
 			secret: ExtendedSecret::with_code(secret, chain_code.clone()),
 			public: ExtendedPublic::new(public, chain_code),
 		}
 	}
 	pub fn with_secret(secret: Secret, chain_code: H256) -> Self {
 		let extended_secret = ExtendedSecret::with_code(secret, chain_code);
 		let extended_public = ExtendedPublic::from_secret(&extended_secret)
 			.expect("Valid `Secret` always produces valid public; qed");
 		ExtendedKeyPair {
 			secret: extended_secret,
 			public: extended_public,
 		}
 	}
 	pub fn with_seed(seed: &[u8]) -> Result<ExtendedKeyPair, DerivationError> {
 		let (master_key, chain_code) = derivation::seed_pair(seed);
 		Ok(ExtendedKeyPair::with_secret(
 			Secret::from_unsafe_slice(master_key.as_bytes()).map_err(|_| DerivationError::InvalidSeed)?,
 			chain_code,
 		))
 	}
 	pub fn secret(&self) -> &ExtendedSecret {
 		&self.secret
 	}
 	pub fn public(&self) -> &ExtendedPublic {
 		&self.public
 	}
 	pub fn derive<T>(&self, index: Derivation<T>) -> Result<Self, DerivationError> where T: Label {
 		let derived = self.secret.derive(index);
 		Ok(ExtendedKeyPair {
 			public: ExtendedPublic::from_secret(&derived)?,
 			secret: derived,
 		})
 	}
 }
 // Derivation functions for private and public keys
 // Work is based on BIP0032
 // https://github.com/bitcoin/bips/blob/master/bip-0032.mediawiki
 mod derivation {
 	use parity_crypto::hmac;
 	use ethereum_types::{BigEndianHash, U256, U512, H512, H256};
 	use secp256k1::key::{SecretKey, PublicKey};
 	use SECP256K1;
 	use keccak;
 	use math::curve_order;
 	use super::{Label, Derivation};
 	use std::convert::TryInto;
 	#[derive(Debug)]
 	pub enum Error {
 		InvalidHardenedUse,
 		InvalidPoint,
 		MissingIndex,
 		InvalidSeed,
 	}
 	// Deterministic derivation of the key using secp256k1 elliptic curve.
 	// Derivation can be either hardened or not.
 	// For hardened derivation, pass u32 index at least 2^31 or custom Derivation::Hard(T) enum
 	//
 	// Can panic if passed `private_key` is not a valid secp256k1 private key
 	// (outside of (0..curve_order()]) field
 	pub fn private<T>(private_key: H256, chain_code: H256, index: Derivation<T>) -> (H256, H256) where T: Label {
 		match index {
 			Derivation::Soft(index) => private_soft(private_key, chain_code, index),
 			Derivation::Hard(index) => private_hard(private_key, chain_code, index),
 		}
 	}
 	fn hmac_pair(data: &[u8], private_key: H256, chain_code: H256) -> (H256, H256) {
 		let private: U256 = private_key.into_uint();
 		// produces 512-bit derived hmac (I)
 		let skey = hmac::SigKey::sha512(chain_code.as_bytes());
 		let i_512 = hmac::sign(&skey, &data[..]);
 		// left most 256 bits are later added to original private key
 		let hmac_key: U256 = H256::from_slice(&i_512[0..32]).into_uint();
 		// right most 256 bits are new chain code for later derivations
 		let next_chain_code = H256::from_slice(&i_512[32..64]);
 		let child_key = BigEndianHash::from_uint(&private_add(hmac_key, private));
 		(child_key, next_chain_code)
 	}
 	// Can panic if passed `private_key` is not a valid secp256k1 private key
 	// (outside of (0..curve_order()]) field
 	fn private_soft<T>(private_key: H256, chain_code: H256, index: T) -> (H256, H256) where T: Label {
 		let mut data = vec![0u8; 33 + T::len()];
 		let sec_private = SecretKey::from_slice(&SECP256K1, private_key.as_bytes())
 			.expect("Caller should provide valid private key");
 		let sec_public = PublicKey::from_secret_key(&SECP256K1, &sec_private)
 			.expect("Caller should provide valid private key");
 		let public_serialized = sec_public.serialize_vec(&SECP256K1, true);
 		// curve point (compressed public key) --  index
 		//             0.33                    --  33..end
 		data[0..33].copy_from_slice(&public_serialized);
 		index.store(&mut data[33..]);
 		hmac_pair(&data, private_key, chain_code)
 	}
 	// Deterministic derivation of the key using secp256k1 elliptic curve
 	// This is hardened derivation and does not allow to associate
 	// corresponding public keys of the original and derived private keys
 	fn private_hard<T>(private_key: H256, chain_code: H256, index: T) -> (H256, H256) where T: Label {
 		let mut data: Vec<u8> = vec![0u8; 33 + T::len()];
 		let private: U256 = private_key.into_uint();
 		// 0x00 (padding) -- private_key --  index
 		//  0             --    1..33    -- 33..end
 		private.to_big_endian(&mut data[1..33]);
 		index.store(&mut data[33..(33 + T::len())]);
 		hmac_pair(&data, private_key, chain_code)
 	}
 	fn private_add(k1: U256, k2: U256) -> U256 {
 		let sum = U512::from(k1) + U512::from(k2);
 		modulo(sum, curve_order())
 	}
 	// todo: surely can be optimized
 	fn modulo(u1: U512, u2: U256) -> U256 {
 		let m = u1 % U512::from(u2);
 		m.try_into().expect("U512 modulo U256 should fit into U256; qed")
 	}
 	pub fn public<T>(public_key: H512, chain_code: H256, derivation: Derivation<T>) -> Result<(H512, H256), Error> where T: Label {
 		let index = match derivation {
 			Derivation::Soft(index) => index,
 			Derivation::Hard(_) => { return Err(Error::InvalidHardenedUse); }
 		};
 		let mut public_sec_raw = [0u8; 65];
 		public_sec_raw[0] = 4;
 		public_sec_raw[1..65].copy_from_slice(public_key.as_bytes());
 		let public_sec = PublicKey::from_slice(&SECP256K1, &public_sec_raw).map_err(|_| Error::InvalidPoint)?;
 		let public_serialized = public_sec.serialize_vec(&SECP256K1, true);
 		let mut data = vec![0u8; 33 + T::len()];
 		// curve point (compressed public key) --  index
 		//             0.33                    --  33..end
 		data[0..33].copy_from_slice(&public_serialized);
 		index.store(&mut data[33..(33 + T::len())]);
 		// HMAC512SHA produces [derived private(256); new chain code(256)]
 		let skey = hmac::SigKey::sha512(chain_code.as_bytes());
 		let i_512 = hmac::sign(&skey, &data[..]);
 		let new_private = H256::from_slice(&i_512[0..32]);
 		let new_chain_code = H256::from_slice(&i_512[32..64]);
 		// Generated private key can (extremely rarely) be out of secp256k1 key field
 		if curve_order() <= new_private.into_uint() { return Err(Error::MissingIndex); }
 		let new_private_sec = SecretKey::from_slice(&SECP256K1, new_private.as_bytes())
 			.expect("Private key belongs to the field [0..CURVE_ORDER) (checked above); So initializing can never fail; qed");
 		let mut new_public = PublicKey::from_secret_key(&SECP256K1, &new_private_sec)
 			.expect("Valid private key produces valid public key");
 		// Adding two points on the elliptic curves (combining two public keys)
 		new_public.add_assign(&SECP256K1, &public_sec)
 			.expect("Addition of two valid points produce valid point");
 		let serialized = new_public.serialize_vec(&SECP256K1, false);
 		Ok((
 			H512::from_slice(&serialized[1..65]),
 			new_chain_code,
 		))
 	}
 	fn sha3(slc: &[u8]) -> H256 {
 		keccak::Keccak256::keccak256(slc).into()
 	}
 	pub fn chain_code(secret: H256) -> H256 {
 		// 10,000 rounds of sha3
 		let mut running_sha3 = sha3(secret.as_bytes());
 		for _ in 0..99999 { running_sha3 = sha3(running_sha3.as_bytes()); }
 		running_sha3
 	}
 	pub fn point(secret: H256) -> Result<H512, Error> {
 		let sec = SecretKey::from_slice(&SECP256K1, secret.as_bytes())
 			.map_err(|_| Error::InvalidPoint)?;
 		let public_sec = PublicKey::from_secret_key(&SECP256K1, &sec)
 			.map_err(|_| Error::InvalidPoint)?;
 		let serialized = public_sec.serialize_vec(&SECP256K1, false);
 		Ok(H512::from_slice(&serialized[1..65]))
 	}
 	pub fn seed_pair(seed: &[u8]) -> (H256, H256) {
 		let skey = hmac::SigKey::sha512(b"Bitcoin seed");
 		let i_512 = hmac::sign(&skey, seed);
 		let master_key = H256::from_slice(&i_512[0..32]);
 		let chain_code = H256::from_slice(&i_512[32..64]);
 		(master_key, chain_code)
 	}
 }
 #[cfg(test)]
 mod tests {
 	use super::{ExtendedSecret, ExtendedPublic, ExtendedKeyPair};
 	use secret::Secret;
 	use std::str::FromStr;
 	use ethereum_types::{H128, H256, H512};
 	use super::{derivation, Derivation};
 	fn master_chain_basic() -> (H256, H256) {
 		let seed = H128::from_str("000102030405060708090a0b0c0d0e0f")
 			.expect("Seed should be valid H128")
 			.as_bytes()
 			.to_vec();
 		derivation::seed_pair(&*seed)
 	}
 	fn test_extended<F>(f: F, test_private: H256) where F: Fn(ExtendedSecret) -> ExtendedSecret {
 		let (private_seed, chain_code) = master_chain_basic();
 		let extended_secret = ExtendedSecret::with_code(Secret::from(private_seed.0), chain_code);
 		let derived = f(extended_secret);
 		assert_eq!(**derived.as_raw(), test_private);
 	}
 	#[test]
 	fn smoky() {
 		let secret = Secret::from_str("a100df7a048e50ed308ea696dc600215098141cb391e9527329df289f9383f65").unwrap();
 		let extended_secret = ExtendedSecret::with_code(secret.clone(), H256::zero());
 		// hardened
 		assert_eq!(&**extended_secret.as_raw(), &*secret);
 		assert_eq!(
 			**extended_secret.derive(2147483648.into()).as_raw(),
 			H256::from_str("0927453daed47839608e414a3738dfad10aed17c459bbd9ab53f89b026c834b6").unwrap(),
 		);
 		assert_eq!(
 			**extended_secret.derive(2147483649.into()).as_raw(),
 			H256::from_str("44238b6a29c6dcbe9b401364141ba11e2198c289a5fed243a1c11af35c19dc0f").unwrap(),
 		);
 		// normal
 		assert_eq!(**extended_secret.derive(0.into()).as_raw(), H256::from_str("bf6a74e3f7b36fc4c96a1e12f31abc817f9f5904f5a8fc27713163d1f0b713f6").unwrap());
 		assert_eq!(**extended_secret.derive(1.into()).as_raw(), H256::from_str("bd4fca9eb1f9c201e9448c1eecd66e302d68d4d313ce895b8c134f512205c1bc").unwrap());
 		assert_eq!(**extended_secret.derive(2.into()).as_raw(), H256::from_str("86932b542d6cab4d9c65490c7ef502d89ecc0e2a5f4852157649e3251e2a3268").unwrap());
 		let extended_public = ExtendedPublic::from_secret(&extended_secret).expect("Extended public should be created");
 		let derived_public = extended_public.derive(0.into()).expect("First derivation of public should succeed");
 		assert_eq!(
 			*derived_public.public(),
 			H512::from_str("f7b3244c96688f92372bfd4def26dc4151529747bab9f188a4ad34e141d47bd66522ff048bc6f19a0a4429b04318b1a8796c000265b4fa200dae5f6dda92dd94").unwrap(),
 		);
 		let keypair = ExtendedKeyPair::with_secret(
 			Secret::from_str("a100df7a048e50ed308ea696dc600215098141cb391e9527329df289f9383f65").unwrap(),
 			H256::from_low_u64_be(64),
 		);
 		assert_eq!(
 			**keypair.derive(2147483648u32.into()).expect("Derivation of keypair should succeed").secret().as_raw(),
 			H256::from_str("edef54414c03196557cf73774bc97a645c9a1df2164ed34f0c2a78d1375a930c").unwrap(),
 		);
 	}
 	#[test]
 	fn h256_soft_match() {
 		let secret = Secret::from_str("a100df7a048e50ed308ea696dc600215098141cb391e9527329df289f9383f65").unwrap();
 		let derivation_secret = H256::from_str("51eaf04f9dbbc1417dc97e789edd0c37ecda88bac490434e367ea81b71b7b015").unwrap();
 		let extended_secret = ExtendedSecret::with_code(secret.clone(), H256::zero());
 		let extended_public = ExtendedPublic::from_secret(&extended_secret).expect("Extended public should be created");
 		let derived_secret0 = extended_secret.derive(Derivation::Soft(derivation_secret));
 		let derived_public0 = extended_public.derive(Derivation::Soft(derivation_secret)).expect("First derivation of public should succeed");
 		let public_from_secret0 = ExtendedPublic::from_secret(&derived_secret0).expect("Extended public should be created");
 		assert_eq!(public_from_secret0.public(), derived_public0.public());
 	}
 	#[test]
 	fn h256_hard() {
 		let secret = Secret::from_str("a100df7a048e50ed308ea696dc600215098141cb391e9527329df289f9383f65").unwrap();
 		let derivation_secret = H256::from_str("51eaf04f9dbbc1417dc97e789edd0c37ecda88bac490434e367ea81b71b7b015").unwrap();
 		let extended_secret = ExtendedSecret::with_code(secret.clone(), H256::from_low_u64_be(1));
 		assert_eq!(
 			**extended_secret.derive(Derivation::Hard(derivation_secret)).as_raw(),
 			H256::from_str("2bc2d696fb744d77ff813b4a1ef0ad64e1e5188b622c54ba917acc5ebc7c5486").unwrap(),
 		);
 	}
 	#[test]
 	fn match_() {
 		let secret = Secret::from_str("a100df7a048e50ed308ea696dc600215098141cb391e9527329df289f9383f65").unwrap();
 		let extended_secret = ExtendedSecret::with_code(secret.clone(), H256::from_low_u64_be(1));
 		let extended_public = ExtendedPublic::from_secret(&extended_secret).expect("Extended public should be created");
 		let derived_secret0 = extended_secret.derive(0.into());
 		let derived_public0 = extended_public.derive(0.into()).expect("First derivation of public should succeed");
 		let public_from_secret0 = ExtendedPublic::from_secret(&derived_secret0).expect("Extended public should be created");
 		assert_eq!(public_from_secret0.public(), derived_public0.public());
 	}
 	#[test]
 	fn test_seeds() {
 		let seed = H128::from_str("000102030405060708090a0b0c0d0e0f")
 			.expect("Seed should be valid H128")
 			.as_bytes()
 			.to_vec();
 		// private key from bitcoin test vector
 		// xprv9wTYmMFdV23N2TdNG573QoEsfRrWKQgWeibmLntzniatZvR9BmLnvSxqu53Kw1UmYPxLgboyZQaXwTCg8MSY3H2EU4pWcQDnRnrVA1xe8fs
 		let test_private = H256::from_str("e8f32e723decf4051aefac8e2c93c9c5b214313817cdb01a1494b917c8436b35")
 			.expect("Private should be decoded ok");
 		let (private_seed, _) = derivation::seed_pair(&*seed);
 		assert_eq!(private_seed, test_private);
 	}
 	#[test]
 	fn test_vector_1() {
 		// xprv9uHRZZhk6KAJC1avXpDAp4MDc3sQKNxDiPvvkX8Br5ngLNv1TxvUxt4cV1rGL5hj6KCesnDYUhd7oWgT11eZG7XnxHrnYeSvkzY7d2bhkJ7
 		// H(0)
 		test_extended(
 			|secret| secret.derive(2147483648.into()),
 			H256::from_str("edb2e14f9ee77d26dd93b4ecede8d16ed408ce149b6cd80b0715a2d911a0afea")
 				.expect("Private should be decoded ok")
 		);
 	}
 	#[test]
 	fn test_vector_2() {
 		// xprv9wTYmMFdV23N2TdNG573QoEsfRrWKQgWeibmLntzniatZvR9BmLnvSxqu53Kw1UmYPxLgboyZQaXwTCg8MSY3H2EU4pWcQDnRnrVA1xe8fs
 		// H(0)/1
 		test_extended(
 			|secret| secret.derive(2147483648.into()).derive(1.into()),
 			H256::from_str("3c6cb8d0f6a264c91ea8b5030fadaa8e538b020f0a387421a12de9319dc93368")
 				.expect("Private should be decoded ok")
 		);
 	}
 }
--- a/accounts/ethkey/src/keccak.rs
+++ b/accounts/ethkey/src/keccak.rs
@ -1,31 +0,0 @@
 // Copyright 2015-2019 Parity Technologies (UK) Ltd.
 // This file is part of Parity Ethereum.
 // Parity Ethereum is free software: you can redistribute it and/or modify
 // it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 // Parity Ethereum is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 // GNU General Public License for more details.
 // You should have received a copy of the GNU General Public License
 // along with Parity Ethereum.  If not, see <http://www.gnu.org/licenses/>.
 use tiny_keccak::Keccak;
 pub trait Keccak256<T> {
 	fn keccak256(&self) -> T where T: Sized;
 }
 impl Keccak256<[u8; 32]> for [u8] {
 	fn keccak256(&self) -> [u8; 32] {
 		let mut keccak = Keccak::new_keccak256();
 		let mut result = [0u8; 32];
 		keccak.update(self);
 		keccak.finalize(&mut result);
 		result
 	}
 }
--- a/accounts/ethkey/src/keypair.rs
+++ b/accounts/ethkey/src/keypair.rs
@ -1,114 +0,0 @@
 // Copyright 2015-2019 Parity Technologies (UK) Ltd.
 // This file is part of Parity Ethereum.
 // Parity Ethereum is free software: you can redistribute it and/or modify
 // it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 // Parity Ethereum is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 // GNU General Public License for more details.
 // You should have received a copy of the GNU General Public License
 // along with Parity Ethereum.  If not, see <http://www.gnu.org/licenses/>.
 use std::fmt;
 use secp256k1::key;
 use super::{Secret, Public, Address, SECP256K1, Error};
 use parity_crypto::Keccak256 as _;
 pub fn public_to_address(public: &Public) -> Address {
 	let hash = public.keccak256();
 	let mut result = Address::zero();
 	result.as_bytes_mut().copy_from_slice(&hash[12..]);
 	result
 }
 #[derive(Debug, Clone, PartialEq)]
 /// secp256k1 key pair
 pub struct KeyPair {
 	secret: Secret,
 	public: Public,
 }
 impl fmt::Display for KeyPair {
 	fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
 		writeln!(f, "secret:  {:x}", self.secret)?;
 		writeln!(f, "public:  {:x}", self.public)?;
 		write!(f, "address: {:x}", self.address())
 	}
 }
 impl KeyPair {
 	/// Create a pair from secret key
 	pub fn from_secret(secret: Secret) -> Result<KeyPair, Error> {
 		let context = &SECP256K1;
 		let s: key::SecretKey = key::SecretKey::from_slice(context, &secret[..])?;
 		let pub_key = key::PublicKey::from_secret_key(context, &s)?;
 		let serialized = pub_key.serialize_vec(context, false);
 		let mut public = Public::default();
 		public.as_bytes_mut().copy_from_slice(&serialized[1..65]);
 		let keypair = KeyPair {
 			secret: secret,
 			public: public,
 		};
 		Ok(keypair)
 	}
 	pub fn from_secret_slice(slice: &[u8]) -> Result<KeyPair, Error> {
 		Self::from_secret(Secret::from_unsafe_slice(slice)?)
 	}
 	pub fn from_keypair(sec: key::SecretKey, publ: key::PublicKey) -> Self {
 		let context = &SECP256K1;
 		let serialized = publ.serialize_vec(context, false);
 		let secret = Secret::from(sec);
 		let mut public = Public::default();
 		public.as_bytes_mut().copy_from_slice(&serialized[1..65]);
 		KeyPair {
 			secret: secret,
 			public: public,
 		}
 	}
 	pub fn secret(&self) -> &Secret {
 		&self.secret
 	}
 	pub fn public(&self) -> &Public {
 		&self.public
 	}
 	pub fn address(&self) -> Address {
 		public_to_address(&self.public)
 	}
 }
 #[cfg(test)]
 mod tests {
 	use std::str::FromStr;
 	use {KeyPair, Secret};
 	#[test]
 	fn from_secret() {
 		let secret = Secret::from_str("a100df7a048e50ed308ea696dc600215098141cb391e9527329df289f9383f65").unwrap();
 		let _ = KeyPair::from_secret(secret).unwrap();
 	}
 	#[test]
 	fn keypair_display() {
 		let expected =
 "secret:  a100df7a048e50ed308ea696dc600215098141cb391e9527329df289f9383f65
 public:  8ce0db0b0359ffc5866ba61903cc2518c3675ef2cf380a7e54bde7ea20e6fa1ab45b7617346cd11b7610001ee6ae5b0155c41cad9527cbcdff44ec67848943a4
 address: 5b073e9233944b5e729e46d618f0d8edf3d9c34a".to_owned();
 		let secret = Secret::from_str("a100df7a048e50ed308ea696dc600215098141cb391e9527329df289f9383f65").unwrap();
 		let kp = KeyPair::from_secret(secret).unwrap();
 		assert_eq!(format!("{}", kp), expected);
 	}
 }
--- a/accounts/ethkey/src/lib.rs
+++ b/accounts/ethkey/src/lib.rs
@ -18,19 +18,9 @@
 extern crate edit_distance;
 extern crate parity_crypto;
 extern crate ethereum_types;
 extern crate parity_wordlist;
 #[macro_use]
 extern crate quick_error;
 extern crate rand;
 extern crate rustc_hex;
 extern crate secp256k1;
 extern crate serde;
 extern crate tiny_keccak;
 extern crate zeroize;
 #[macro_use]
 extern crate lazy_static;
 #[macro_use]
 extern crate log;
 #[macro_use]
@ -38,50 +28,13 @@ extern crate serde_derive;
 mod brain;
 mod brain_prefix;
 mod error;
 mod keypair;
 mod keccak;
 mod password;
 mod prefix;
 mod random;
 mod signature;
 mod secret;
 mod extended;
 pub mod brain_recover;
 pub mod crypto;
 pub mod math;
 pub use self::parity_wordlist::Error as WordlistError;
 pub use self::brain::Brain;
 pub use self::brain_prefix::BrainPrefix;
 pub use self::error::Error;
 pub use self::keypair::{KeyPair, public_to_address};
 pub use self::math::public_is_valid;
 pub use self::password::Password;
 pub use self::prefix::Prefix;
 pub use self::random::Random;
 pub use self::signature::{sign, verify_public, verify_address, recover, Signature};
 pub use self::secret::Secret;
 pub use self::extended::{ExtendedPublic, ExtendedSecret, ExtendedKeyPair, DerivationError, Derivation};
 use ethereum_types::H256;
 pub use ethereum_types::{Address, Public};
 pub type Message = H256;
 lazy_static! {
 	pub static ref SECP256K1: secp256k1::Secp256k1 = secp256k1::Secp256k1::new();
 }
 /// Uninstantiatable error type for infallible generators.
 #[derive(Debug)]
 pub enum Void {}
 /// Generates new keypair.
 pub trait Generator {
 	type Error;
 	/// Should be called to generate new keypair.
 	fn generate(&mut self) -> Result<KeyPair, Self::Error>;
 }
--- a/accounts/ethkey/src/math.rs
+++ b/accounts/ethkey/src/math.rs
@ -1,129 +0,0 @@
 // Copyright 2015-2019 Parity Technologies (UK) Ltd.
 // This file is part of Parity Ethereum.
 // Parity Ethereum is free software: you can redistribute it and/or modify
 // it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 // Parity Ethereum is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 // GNU General Public License for more details.
 // You should have received a copy of the GNU General Public License
 // along with Parity Ethereum.  If not, see <http://www.gnu.org/licenses/>.
 use super::{SECP256K1, Public, Secret, Error};
 use secp256k1::key;
 use secp256k1::constants::{GENERATOR_X, GENERATOR_Y, CURVE_ORDER};
 use ethereum_types::{BigEndianHash as _, U256, H256};
 /// Whether the public key is valid.
 pub fn public_is_valid(public: &Public) -> bool {
 	to_secp256k1_public(public).ok()
 		.map_or(false, |p| p.is_valid())
 }
 /// Inplace multiply public key by secret key (EC point * scalar)
 pub fn public_mul_secret(public: &mut Public, secret: &Secret) -> Result<(), Error> {
 	let key_secret = secret.to_secp256k1_secret()?;
 	let mut key_public = to_secp256k1_public(public)?;
 	key_public.mul_assign(&SECP256K1, &key_secret)?;
 	set_public(public, &key_public);
 	Ok(())
 }
 /// Inplace add one public key to another (EC point + EC point)
 pub fn public_add(public: &mut Public, other: &Public) -> Result<(), Error> {
 	let mut key_public = to_secp256k1_public(public)?;
 	let other_public = to_secp256k1_public(other)?;
 	key_public.add_assign(&SECP256K1, &other_public)?;
 	set_public(public, &key_public);
 	Ok(())
 }
 /// Inplace sub one public key from another (EC point - EC point)
 pub fn public_sub(public: &mut Public, other: &Public) -> Result<(), Error> {
 	let mut key_neg_other = to_secp256k1_public(other)?;
 	key_neg_other.mul_assign(&SECP256K1, &key::MINUS_ONE_KEY)?;
 	let mut key_public = to_secp256k1_public(public)?;
 	key_public.add_assign(&SECP256K1, &key_neg_other)?;
 	set_public(public, &key_public);
 	Ok(())
 }
 /// Replace public key with its negation (EC point = - EC point)
 pub fn public_negate(public: &mut Public) -> Result<(), Error> {
 	let mut key_public = to_secp256k1_public(public)?;
 	key_public.mul_assign(&SECP256K1, &key::MINUS_ONE_KEY)?;
 	set_public(public, &key_public);
 	Ok(())
 }
 /// Return base point of secp256k1
 pub fn generation_point() -> Public {
 	let mut public_sec_raw = [0u8; 65];
 	public_sec_raw[0] = 4;
 	public_sec_raw[1..33].copy_from_slice(&GENERATOR_X);
 	public_sec_raw[33..65].copy_from_slice(&GENERATOR_Y);
 	let public_key = key::PublicKey::from_slice(&SECP256K1, &public_sec_raw)
 		.expect("constructing using predefined constants; qed");
 	let mut public = Public::default();
 	set_public(&mut public, &public_key);
 	public
 }
 /// Return secp256k1 elliptic curve order
 pub fn curve_order() -> U256 {
 	H256::from_slice(&CURVE_ORDER).into_uint()
 }
 fn to_secp256k1_public(public: &Public) -> Result<key::PublicKey, Error> {
 	let public_data = {
 		let mut temp = [4u8; 65];
 		(&mut temp[1..65]).copy_from_slice(&public[0..64]);
 		temp
 	};
 	Ok(key::PublicKey::from_slice(&SECP256K1, &public_data)?)
 }
 fn set_public(public: &mut Public, key_public: &key::PublicKey) {
 	let key_public_serialized = key_public.serialize_vec(&SECP256K1, false);
 	public.as_bytes_mut().copy_from_slice(&key_public_serialized[1..65]);
 }
 #[cfg(test)]
 mod tests {
 	use super::super::{Random, Generator};
 	use super::{public_add, public_sub};
 	#[test]
 	fn public_addition_is_commutative() {
 		let public1 = Random.generate().unwrap().public().clone();
 		let public2 = Random.generate().unwrap().public().clone();
 		let mut left = public1.clone();
 		public_add(&mut left, &public2).unwrap();
 		let mut right = public2.clone();
 		public_add(&mut right, &public1).unwrap();
 		assert_eq!(left, right);
 	}
 	#[test]
 	fn public_addition_is_reversible_with_subtraction() {
 		let public1 = Random.generate().unwrap().public().clone();
 		let public2 = Random.generate().unwrap().public().clone();
 		let mut sum = public1.clone();
 		public_add(&mut sum, &public2).unwrap();
 		public_sub(&mut sum, &public2).unwrap();
 		assert_eq!(sum, public1);
 	}
 }
--- a/accounts/ethkey/src/prefix.rs
+++ b/accounts/ethkey/src/prefix.rs
@ -14,7 +14,7 @@
 // You should have received a copy of the GNU General Public License
 // along with Parity Ethereum.  If not, see <http://www.gnu.org/licenses/>.
-use super::{Random, Generator, KeyPair, Error};
+use parity_crypto::publickey::{Random, Generator, KeyPair, Error};
 /// Tries to find keypair with address starting with given prefix.
 pub struct Prefix {
@ -48,7 +48,8 @@ impl Generator for Prefix {
 #[cfg(test)]
 mod tests {
-	use {Generator, Prefix};
+	use Prefix;
 	use parity_crypto::publickey::Generator;
 	#[test]
 	fn prefix_generator() {
--- a/accounts/ethkey/src/random.rs
+++ b/accounts/ethkey/src/random.rs
@ -1,42 +0,0 @@
 // Copyright 2015-2019 Parity Technologies (UK) Ltd.
 // This file is part of Parity Ethereum.
 // Parity Ethereum is free software: you can redistribute it and/or modify
 // it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 // Parity Ethereum is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 // GNU General Public License for more details.
 // You should have received a copy of the GNU General Public License
 // along with Parity Ethereum.  If not, see <http://www.gnu.org/licenses/>.
 use rand::rngs::OsRng;
 use super::{Generator, KeyPair, SECP256K1};
 /// Randomly generates new keypair, instantiating the RNG each time.
 pub struct Random;
 impl Generator for Random {
 	type Error = std::io::Error;
 	fn generate(&mut self) -> Result<KeyPair, Self::Error> {
 		Generator::generate(&mut OsRng).map_err(|void| {
 			match void {} // LLVM unreachable
 		})
 	}
 }
 impl Generator for OsRng {
 	type Error = ::Void;
 	fn generate(&mut self) -> Result<KeyPair, Self::Error> {
 		let (sec, publ) = SECP256K1.generate_keypair(self)
 			.expect("context always created with full capabilities; qed");
 		Ok(KeyPair::from_keypair(sec, publ))
 	}
 }
--- a/accounts/ethkey/src/secret.rs
+++ b/accounts/ethkey/src/secret.rs
@ -1,304 +0,0 @@
 // Copyright 2015-2019 Parity Technologies (UK) Ltd.
 // This file is part of Parity Ethereum.
 // Parity Ethereum is free software: you can redistribute it and/or modify
 // it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 // Parity Ethereum is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 // GNU General Public License for more details.
 // You should have received a copy of the GNU General Public License
 // along with Parity Ethereum.  If not, see <http://www.gnu.org/licenses/>.
 use std::fmt;
 use std::ops::Deref;
 use std::str::FromStr;
 use rustc_hex::ToHex;
 use secp256k1::constants::{SECRET_KEY_SIZE as SECP256K1_SECRET_KEY_SIZE};
 use secp256k1::key;
 use ethereum_types::H256;
 use zeroize::Zeroize;
 use {Error, SECP256K1};
 #[derive(Clone, PartialEq, Eq)]
 pub struct Secret {
 	inner: H256,
 }
 impl Drop for Secret {
 	fn drop(&mut self) {
 		self.inner.0.zeroize()
 	}
 }
 impl ToHex for Secret {
 	fn to_hex(&self) -> String {
 		format!("{:x}", self.inner)
 	}
 }
 impl fmt::LowerHex for Secret {
 	fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
 		self.inner.fmt(fmt)
 	}
 }
 impl fmt::Debug for Secret {
 	fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
 		self.inner.fmt(fmt)
 	}
 }
 impl fmt::Display for Secret {
 	fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
 		write!(fmt, "Secret: 0x{:x}{:x}..{:x}{:x}", self.inner[0], self.inner[1], self.inner[30], self.inner[31])
 	}
 }
 impl Secret {
 	/// Creates a `Secret` from the given slice, returning `None` if the slice length != 32.
 	pub fn from_slice(key: &[u8]) -> Option<Self> {
 		if key.len() != 32 {
 			return None
 		}
 		let mut h = H256::zero();
 		h.as_bytes_mut().copy_from_slice(&key[0..32]);
 		Some(Secret { inner: h })
 	}
 	/// Creates zero key, which is invalid for crypto operations, but valid for math operation.
 	pub fn zero() -> Self {
 		Secret { inner: H256::zero() }
 	}
 	/// Imports and validates the key.
 	pub fn from_unsafe_slice(key: &[u8]) -> Result<Self, Error> {
 		let secret = key::SecretKey::from_slice(&super::SECP256K1, key)?;
 		Ok(secret.into())
 	}
 	/// Checks validity of this key.
 	pub fn check_validity(&self) -> Result<(), Error> {
 		self.to_secp256k1_secret().map(|_| ())
 	}
 	/// Inplace add one secret key to another (scalar + scalar)
 	pub fn add(&mut self, other: &Secret) -> Result<(), Error> {
 		match (self.is_zero(), other.is_zero()) {
 			(true, true) | (false, true) => Ok(()),
 			(true, false) => {
 				*self = other.clone();
 				Ok(())
 			},
 			(false, false) => {
 				let mut key_secret = self.to_secp256k1_secret()?;
 				let other_secret = other.to_secp256k1_secret()?;
 				key_secret.add_assign(&SECP256K1, &other_secret)?;
 				*self = key_secret.into();
 				Ok(())
 			},
 		}
 	}
 	/// Inplace subtract one secret key from another (scalar - scalar)
 	pub fn sub(&mut self, other: &Secret) -> Result<(), Error> {
 		match (self.is_zero(), other.is_zero()) {
 			(true, true) | (false, true) => Ok(()),
 			(true, false) => {
 				*self = other.clone();
 				self.neg()
 			},
 			(false, false) => {
 				let mut key_secret = self.to_secp256k1_secret()?;
 				let mut other_secret = other.to_secp256k1_secret()?;
 				other_secret.mul_assign(&SECP256K1, &key::MINUS_ONE_KEY)?;
 				key_secret.add_assign(&SECP256K1, &other_secret)?;
 				*self = key_secret.into();
 				Ok(())
 			},
 		}
 	}
 	/// Inplace decrease secret key (scalar - 1)
 	pub fn dec(&mut self) -> Result<(), Error> {
 		match self.is_zero() {
 			true => {
 				*self = key::MINUS_ONE_KEY.into();
 				Ok(())
 			},
 			false => {
 				let mut key_secret = self.to_secp256k1_secret()?;
 				key_secret.add_assign(&SECP256K1, &key::MINUS_ONE_KEY)?;
 				*self = key_secret.into();
 				Ok(())
 			},
 		}
 	}
 	/// Inplace multiply one secret key to another (scalar * scalar)
 	pub fn mul(&mut self, other: &Secret) -> Result<(), Error> {
 		match (self.is_zero(), other.is_zero()) {
 			(true, true) | (true, false) => Ok(()),
 			(false, true) => {
 				*self = Self::zero();
 				Ok(())
 			},
 			(false, false) => {
 				let mut key_secret = self.to_secp256k1_secret()?;
 				let other_secret = other.to_secp256k1_secret()?;
 				key_secret.mul_assign(&SECP256K1, &other_secret)?;
 				*self = key_secret.into();
 				Ok(())
 			},
 		}
 	}
 	/// Inplace negate secret key (-scalar)
 	pub fn neg(&mut self) -> Result<(), Error> {
 		match self.is_zero() {
 			true => Ok(()),
 			false => {
 				let mut key_secret = self.to_secp256k1_secret()?;
 				key_secret.mul_assign(&SECP256K1, &key::MINUS_ONE_KEY)?;
 				*self = key_secret.into();
 				Ok(())
 			},
 		}
 	}
 	/// Inplace inverse secret key (1 / scalar)
 	pub fn inv(&mut self) -> Result<(), Error> {
 		let mut key_secret = self.to_secp256k1_secret()?;
 		key_secret.inv_assign(&SECP256K1)?;
 		*self = key_secret.into();
 		Ok(())
 	}
 	/// Compute power of secret key inplace (secret ^ pow).
 	/// This function is not intended to be used with large powers.
 	pub fn pow(&mut self, pow: usize) -> Result<(), Error> {
 		if self.is_zero() {
 			return Ok(());
 		}
 		match pow {
 			0 => *self = key::ONE_KEY.into(),
 			1 => (),
 			_ => {
 				let c = self.clone();
 				for _ in 1..pow {
 					self.mul(&c)?;
 				}
 			},
 		}
 		Ok(())
 	}
 	/// Create `secp256k1::key::SecretKey` based on this secret
 	pub fn to_secp256k1_secret(&self) -> Result<key::SecretKey, Error> {
 		Ok(key::SecretKey::from_slice(&SECP256K1, &self[..])?)
 	}
 }
 impl FromStr for Secret {
 	type Err = Error;
 	fn from_str(s: &str) -> Result<Self, Self::Err> {
 		Ok(H256::from_str(s).map_err(|e| Error::Custom(format!("{:?}", e)))?.into())
 	}
 }
 impl From<[u8; 32]> for Secret {
 	fn from(k: [u8; 32]) -> Self {
 		Secret { inner: H256(k) }
 	}
 }
 impl From<H256> for Secret {
 	fn from(s: H256) -> Self {
 		s.0.into()
 	}
 }
 impl From<&'static str> for Secret {
 	fn from(s: &'static str) -> Self {
 		s.parse().expect(&format!("invalid string literal for {}: '{}'", stringify!(Self), s))
 	}
 }
 impl From<key::SecretKey> for Secret {
 	fn from(key: key::SecretKey) -> Self {
 		let mut a = [0; SECP256K1_SECRET_KEY_SIZE];
 		a.copy_from_slice(&key[0 .. SECP256K1_SECRET_KEY_SIZE]);
 		a.into()
 	}
 }
 impl Deref for Secret {
 	type Target = H256;
 	fn deref(&self) -> &Self::Target {
 		&self.inner
 	}
 }
 #[cfg(test)]
 mod tests {
 	use std::str::FromStr;
 	use super::super::{Random, Generator};
 	use super::Secret;
 	#[test]
 	fn multiplicating_secret_inversion_with_secret_gives_one() {
 		let secret = Random.generate().unwrap().secret().clone();
 		let mut inversion = secret.clone();
 		inversion.inv().unwrap();
 		inversion.mul(&secret).unwrap();
 		assert_eq!(inversion, Secret::from_str("0000000000000000000000000000000000000000000000000000000000000001").unwrap());
 	}
 	#[test]
 	fn secret_inversion_is_reversible_with_inversion() {
 		let secret = Random.generate().unwrap().secret().clone();
 		let mut inversion = secret.clone();
 		inversion.inv().unwrap();
 		inversion.inv().unwrap();
 		assert_eq!(inversion, secret);
 	}
 	#[test]
 	fn secret_pow() {
 		let secret = Random.generate().unwrap().secret().clone();
 		let mut pow0 = secret.clone();
 		pow0.pow(0).unwrap();
 		assert_eq!(pow0, Secret::from_str("0000000000000000000000000000000000000000000000000000000000000001").unwrap());
 		let mut pow1 = secret.clone();
 		pow1.pow(1).unwrap();
 		assert_eq!(pow1, secret);
 		let mut pow2 = secret.clone();
 		pow2.pow(2).unwrap();
 		let mut pow2_expected = secret.clone();
 		pow2_expected.mul(&secret).unwrap();
 		assert_eq!(pow2, pow2_expected);
 		let mut pow3 = secret.clone();
 		pow3.pow(3).unwrap();
 		let mut pow3_expected = secret.clone();
 		pow3_expected.mul(&secret).unwrap();
 		pow3_expected.mul(&secret).unwrap();
 		assert_eq!(pow3, pow3_expected);
 	}
 }
--- a/accounts/ethkey/src/signature.rs
+++ b/accounts/ethkey/src/signature.rs
@ -1,314 +0,0 @@
 // Copyright 2015-2019 Parity Technologies (UK) Ltd.
 // This file is part of Parity Ethereum.
 // Parity Ethereum is free software: you can redistribute it and/or modify
 // it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 // Parity Ethereum is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 // GNU General Public License for more details.
 // You should have received a copy of the GNU General Public License
 // along with Parity Ethereum.  If not, see <http://www.gnu.org/licenses/>.
 use std::ops::{Deref, DerefMut};
 use std::cmp::PartialEq;
 use std::fmt;
 use std::str::FromStr;
 use std::hash::{Hash, Hasher};
 use secp256k1::{Message as SecpMessage, RecoverableSignature, RecoveryId, Error as SecpError};
 use secp256k1::key::{SecretKey, PublicKey};
 use rustc_hex::{ToHex, FromHex};
 use ethereum_types::{H520, H256};
 use {Secret, Public, SECP256K1, Error, Message, public_to_address, Address};
 /// Signature encoded as RSV components
 #[repr(C)]
 pub struct Signature([u8; 65]);
 impl Signature {
 	/// Get a slice into the 'r' portion of the data.
 	pub fn r(&self) -> &[u8] {
 		&self.0[0..32]
 	}
 	/// Get a slice into the 's' portion of the data.
 	pub fn s(&self) -> &[u8] {
 		&self.0[32..64]
 	}
 	/// Get the recovery byte.
 	pub fn v(&self) -> u8 {
 		self.0[64]
 	}
 	/// Encode the signature into RSV array (V altered to be in "Electrum" notation).
 	pub fn into_electrum(mut self) -> [u8; 65] {
 		self.0[64] += 27;
 		self.0
 	}
 	/// Parse bytes as a signature encoded as RSV (V in "Electrum" notation).
 	/// May return empty (invalid) signature if given data has invalid length.
 	pub fn from_electrum(data: &[u8]) -> Self {
 		if data.len() != 65 || data[64] < 27 {
 			// fallback to empty (invalid) signature
 			return Signature::default();
 		}
 		let mut sig = [0u8; 65];
 		sig.copy_from_slice(data);
 		sig[64] -= 27;
 		Signature(sig)
 	}
 	/// Create a signature object from the sig.
 	pub fn from_rsv(r: &H256, s: &H256, v: u8) -> Self {
 		let mut sig = [0u8; 65];
 		sig[0..32].copy_from_slice(r.as_ref());
 		sig[32..64].copy_from_slice(s.as_ref());
 		sig[64] = v;
 		Signature(sig)
 	}
 	/// Check if this is a "low" signature.
 	pub fn is_low_s(&self) -> bool {
 		// "7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0"
 		const MASK: H256 = H256([
 			0x7F, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
 			0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
 			0x5D, 0x57, 0x6E, 0x73, 0x57, 0xA4, 0x50, 0x1D,
 			0xDF, 0xE9, 0x2F, 0x46, 0x68, 0x1B, 0x20, 0xA0,
 		]);
 		H256::from_slice(self.s()) <= MASK
 	}
 	/// Check if each component of the signature is in range.
 	pub fn is_valid(&self) -> bool {
 		// "fffffffffffffffffffffffffffffffebaaedce6af48a03bbfd25e8cd0364141"
 		const MASK: H256 = H256([
 			0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 			0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe,
 			0xba, 0xae, 0xdc, 0xe6, 0xaf, 0x48, 0xa0, 0x3b,
 			0xbf, 0xd2, 0x5e, 0x8c, 0xd0, 0x36, 0x41, 0x41,
 		]);
 		const ONE: H256 = H256([
 			0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
 		]);
 		let r = H256::from_slice(self.r());
 		let s = H256::from_slice(self.s());
 		self.v() <= 1 &&
 			r < MASK && r >= ONE &&
 			s < MASK && s >= ONE
 	}
 }
 // manual implementation large arrays don't have trait impls by default.
 // remove when integer generics exist
 impl PartialEq for Signature {
 	fn eq(&self, other: &Self) -> bool {
 		&self.0[..] == &other.0[..]
 	}
 }
 // manual implementation required in Rust 1.13+, see `std::cmp::AssertParamIsEq`.
 impl Eq for Signature { }
 // also manual for the same reason, but the pretty printing might be useful.
 impl fmt::Debug for Signature {
 	fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
 		f.debug_struct("Signature")
 			.field("r", &self.0[0..32].to_hex())
 			.field("s", &self.0[32..64].to_hex())
 			.field("v", &self.0[64..65].to_hex())
 		.finish()
 	}
 }
 impl fmt::Display for Signature {
 	fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
 		write!(f, "{}", self.to_hex())
 	}
 }
 impl FromStr for Signature {
 	type Err = Error;
 	fn from_str(s: &str) -> Result<Self, Self::Err> {
 		match s.from_hex() {
 			Ok(ref hex) if hex.len() == 65 => {
 				let mut data = [0; 65];
 				data.copy_from_slice(&hex[0..65]);
 				Ok(Signature(data))
 			},
 			_ => Err(Error::InvalidSignature)
 		}
 	}
 }
 impl Default for Signature {
 	fn default() -> Self {
 		Signature([0; 65])
 	}
 }
 impl Hash for Signature {
    fn hash<H: Hasher>(&self, state: &mut H) {
    	H520::from(self.0).hash(state);
    }
 }
 impl Clone for Signature {
    fn clone(&self) -> Self {
 		Signature(self.0)
    }
 }
 impl From<[u8; 65]> for Signature {
 	fn from(s: [u8; 65]) -> Self {
 		Signature(s)
 	}
 }
 impl Into<[u8; 65]> for Signature {
 	fn into(self) -> [u8; 65] {
 		self.0
 	}
 }
 impl From<Signature> for H520 {
 	fn from(s: Signature) -> Self {
 		H520::from(s.0)
 	}
 }
 impl From<H520> for Signature {
 	fn from(bytes: H520) -> Self {
 		Signature(bytes.into())
 	}
 }
 impl Deref for Signature {
 	type Target = [u8; 65];
 	fn deref(&self) -> &Self::Target {
 		&self.0
 	}
 }
 impl DerefMut for Signature {
 	fn deref_mut(&mut self) -> &mut Self::Target {
 		&mut self.0
 	}
 }
 pub fn sign(secret: &Secret, message: &Message) -> Result<Signature, Error> {
 	let context = &SECP256K1;
 	let sec = SecretKey::from_slice(context, secret.as_ref())?;
 	let s = context.sign_recoverable(&SecpMessage::from_slice(&message[..])?, &sec)?;
 	let (rec_id, data) = s.serialize_compact(context);
 	let mut data_arr = [0; 65];
 	// no need to check if s is low, it always is
 	data_arr[0..64].copy_from_slice(&data[0..64]);
 	data_arr[64] = rec_id.to_i32() as u8;
 	Ok(Signature(data_arr))
 }
 pub fn verify_public(public: &Public, signature: &Signature, message: &Message) -> Result<bool, Error> {
 	let context = &SECP256K1;
 	let rsig = RecoverableSignature::from_compact(context, &signature[0..64], RecoveryId::from_i32(signature[64] as i32)?)?;
 	let sig = rsig.to_standard(context);
 	let pdata: [u8; 65] = {
 		let mut temp = [4u8; 65];
 		temp[1..65].copy_from_slice(public.as_bytes());
 		temp
 	};
 	let publ = PublicKey::from_slice(context, &pdata)?;
 	match context.verify(&SecpMessage::from_slice(&message[..])?, &sig, &publ) {
 		Ok(_) => Ok(true),
 		Err(SecpError::IncorrectSignature) => Ok(false),
 		Err(x) => Err(Error::from(x))
 	}
 }
 pub fn verify_address(address: &Address, signature: &Signature, message: &Message) -> Result<bool, Error> {
 	let public = recover(signature, message)?;
 	let recovered_address = public_to_address(&public);
 	Ok(address == &recovered_address)
 }
 pub fn recover(signature: &Signature, message: &Message) -> Result<Public, Error> {
 	let context = &SECP256K1;
 	let rsig = RecoverableSignature::from_compact(context, &signature[0..64], RecoveryId::from_i32(signature[64] as i32)?)?;
 	let pubkey = context.recover(&SecpMessage::from_slice(&message[..])?, &rsig)?;
 	let serialized = pubkey.serialize_vec(context, false);
 	let mut public = Public::default();
 	public.as_bytes_mut().copy_from_slice(&serialized[1..65]);
 	Ok(public)
 }
 #[cfg(test)]
 mod tests {
 	use std::str::FromStr;
 	use {Generator, Random, Message};
 	use super::{sign, verify_public, verify_address, recover, Signature};
 	#[test]
 	fn vrs_conversion() {
 		// given
 		let keypair = Random.generate().unwrap();
 		let message = Message::default();
 		let signature = sign(keypair.secret(), &message).unwrap();
 		// when
 		let vrs = signature.clone().into_electrum();
 		let from_vrs = Signature::from_electrum(&vrs);
 		// then
 		assert_eq!(signature, from_vrs);
 	}
 	#[test]
 	fn signature_to_and_from_str() {
 		let keypair = Random.generate().unwrap();
 		let message = Message::default();
 		let signature = sign(keypair.secret(), &message).unwrap();
 		let string = format!("{}", signature);
 		let deserialized = Signature::from_str(&string).unwrap();
 		assert_eq!(signature, deserialized);
 	}
 	#[test]
 	fn sign_and_recover_public() {
 		let keypair = Random.generate().unwrap();
 		let message = Message::default();
 		let signature = sign(keypair.secret(), &message).unwrap();
 		assert_eq!(keypair.public(), &recover(&signature, &message).unwrap());
 	}
 	#[test]
 	fn sign_and_verify_public() {
 		let keypair = Random.generate().unwrap();
 		let message = Message::default();
 		let signature = sign(keypair.secret(), &message).unwrap();
 		assert!(verify_public(keypair.public(), &signature, &message).unwrap());
 	}
 	#[test]
 	fn sign_and_verify_address() {
 		let keypair = Random.generate().unwrap();
 		let message = Message::default();
 		let signature = sign(keypair.secret(), &message).unwrap();
 		assert!(verify_address(&keypair.address(), &signature, &message).unwrap());
 	}
 }
--- a/accounts/ethstore/Cargo.toml
+++ b/accounts/ethstore/Cargo.toml
@ -17,7 +17,7 @@ tiny-keccak = "1.4"
 time = "0.1.34"
 itertools = "0.5"
 parking_lot = "0.9"
-parity-crypto = "0.4.0"
+parity-crypto = { version = "0.4.2", features = ["publickey"] }
 ethereum-types = "0.8.0"
 dir = { path = "../../util/dir" }
 smallvec = "0.6"
--- a/accounts/ethstore/cli/Cargo.toml
+++ b/accounts/ethstore/cli/Cargo.toml
@ -13,6 +13,8 @@ serde = "1.0"
 serde_derive = "1.0"
 parking_lot = "0.9"
 ethstore = { path = "../" }
 ethkey = { path = "../../ethkey" }
 parity-crypto = { version = "0.4.2", features = ["publickey"] }
 dir = { path = '../../../util/dir' }
 panic_hook = { path = "../../../util/panic-hook" }
--- a/accounts/ethstore/cli/src/crack.rs
+++ b/accounts/ethstore/cli/src/crack.rs
@ -19,7 +19,8 @@ use std::sync::Arc;
 use std::collections::VecDeque;
 use parking_lot::Mutex;
-use ethstore::{ethkey::Password, PresaleWallet, Error};
+use ethstore::{PresaleWallet, Error};
 use ethkey::Password;
 use num_cpus;
 pub fn run(passwords: VecDeque<Password>, wallet_path: &str) -> Result<(), Error> {
--- a/accounts/ethstore/cli/src/main.rs
+++ b/accounts/ethstore/cli/src/main.rs
@ -17,9 +17,11 @@
 extern crate dir;
 extern crate docopt;
 extern crate ethstore;
 extern crate ethkey;
 extern crate num_cpus;
 extern crate panic_hook;
 extern crate parking_lot;
 extern crate parity_crypto;
 extern crate rustc_hex;
 extern crate serde;
@ -34,7 +36,8 @@ use std::{env, process, fs, fmt};
 use docopt::Docopt;
 use ethstore::accounts_dir::{KeyDirectory, RootDiskDirectory};
-use ethstore::ethkey::{Address, Password};
+use ethkey::Password;
 use parity_crypto::publickey::Address;
 use ethstore::{EthStore, SimpleSecretStore, SecretStore, import_accounts, PresaleWallet, SecretVaultRef, StoreAccountRef};
 mod crack;
--- a/accounts/ethstore/src/account/crypto.rs
+++ b/accounts/ethstore/src/account/crypto.rs
@ -15,7 +15,8 @@
 // along with Parity Ethereum.  If not, see <http://www.gnu.org/licenses/>.
 use std::str;
-use ethkey::{Password, Secret};
+use crypto::publickey::Secret;
 use ethkey::Password;
 use {json, Error, crypto};
 use crypto::Keccak256;
 use random::Random;
@ -120,7 +121,7 @@ impl Crypto {
 		}
 		let secret = self.do_decrypt(password, 32)?;
-		Ok(Secret::from_unsafe_slice(&secret)?)
+		Ok(Secret::import_key(&secret)?)
 	}
 	/// Try to decrypt and return result as is
@ -158,7 +159,7 @@ impl Crypto {
 #[cfg(test)]
 mod tests {
-	use ethkey::{Generator, Random};
+	use crypto::publickey::{Generator, Random};
 	use super::{Crypto, Error};
 	#[test]
--- a/accounts/ethstore/src/account/safe_account.rs
+++ b/accounts/ethstore/src/account/safe_account.rs
@ -14,8 +14,9 @@
 // You should have received a copy of the GNU General Public License
 // along with Parity Ethereum.  If not, see <http://www.gnu.org/licenses/>.
-use ethkey::{self, KeyPair, sign, Address, Password, Signature, Message, Public, Secret};
+use crypto::publickey::{KeyPair, sign, Address, Signature, Message, Public, Secret};
-use ethkey::crypto::ecdh::agree;
+use ethkey::Password;
 use crypto::publickey::ecdh::agree;
 use {json, Error};
 use account::Version;
 use crypto;
@ -161,7 +162,7 @@ impl SafeAccount {
 	/// Decrypt a message.
 	pub fn decrypt(&self, password: &Password, shared_mac: &[u8], message: &[u8]) -> Result<Vec<u8>, Error> {
 		let secret = self.crypto.secret(password)?;
-		ethkey::crypto::ecies::decrypt(&secret, shared_mac, message).map_err(From::from)
+		crypto::publickey::ecies::decrypt(&secret, shared_mac, message).map_err(From::from)
 	}
 	/// Agree on shared key.
@ -199,7 +200,7 @@ impl SafeAccount {
 #[cfg(test)]
 mod tests {
-	use ethkey::{Generator, Random, verify_public, Message};
+	use crypto::publickey::{Generator, Random, verify_public, Message};
 	use super::SafeAccount;
 	#[test]
--- a/accounts/ethstore/src/accounts_dir/disk.rs
+++ b/accounts/ethstore/src/accounts_dir/disk.rs
@ -356,7 +356,7 @@ mod test {
 	use std::{env, fs};
 	use super::{KeyDirectory, RootDiskDirectory, VaultKey};
 	use account::SafeAccount;
-	use ethkey::{Random, Generator};
+	use crypto::publickey::{Random, Generator};
 	use self::tempdir::TempDir;
 	#[test]
--- a/accounts/ethstore/src/accounts_dir/memory.rs
+++ b/accounts/ethstore/src/accounts_dir/memory.rs
@ -17,7 +17,7 @@
 use std::collections::HashMap;
 use parking_lot::RwLock;
 use itertools;
-use ethkey::Address;
+use crypto::publickey::Address;
 use {SafeAccount, Error};
 use super::KeyDirectory;
--- a/accounts/ethstore/src/error.rs
+++ b/accounts/ethstore/src/error.rs
@ -16,9 +16,8 @@
 use std::fmt;
 use std::io::Error as IoError;
 use ethkey::{self, Error as EthKeyError};
 use crypto::{self, Error as EthCryptoError};
-use ethkey::DerivationError;
+use crypto::publickey::{Error as EthPublicKeyCryptoError, DerivationError};
 /// Account-related errors.
 #[derive(Debug)]
@ -47,12 +46,10 @@ pub enum Error {
 	VaultNotFound,
 	/// Account creation failed.
 	CreationFailed,
 	/// `EthKey` error
 	EthKey(EthKeyError),
 	/// `ethkey::crypto::Error`
 	EthKeyCrypto(ethkey::crypto::Error),
 	/// `EthCrypto` error
 	EthCrypto(EthCryptoError),
 	/// `EthPublicKeyCryptoError` error
 	EthPublicKeyCrypto(EthPublicKeyCryptoError),
 	/// Derivation error
 	Derivation(DerivationError),
 	/// Custom error
@ -74,9 +71,8 @@ impl fmt::Display for Error {
 			Error::InvalidVaultName => "Invalid vault name".into(),
 			Error::VaultNotFound => "Vault not found".into(),
 			Error::CreationFailed => "Account creation failed".into(),
 			Error::EthKey(ref err) => err.to_string(),
 			Error::EthKeyCrypto(ref err) => err.to_string(),
 			Error::EthCrypto(ref err) => err.to_string(),
 			Error::EthPublicKeyCrypto(ref err) => err.to_string(),
 			Error::Derivation(ref err) => format!("Derivation error: {:?}", err),
 			Error::Custom(ref s) => s.clone(),
 		};
@ -91,15 +87,9 @@ impl From<IoError> for Error {
 	}
 }
-impl From<EthKeyError> for Error {
+impl From<EthPublicKeyCryptoError> for Error {
-	fn from(err: EthKeyError) -> Self {
+	fn from(err: EthPublicKeyCryptoError) -> Self {
-		Error::EthKey(err)
+		Error::EthPublicKeyCrypto(err)
 	}
 }
 impl From<ethkey::crypto::Error> for Error {
 	fn from(err: ethkey::crypto::Error) -> Self {
 		Error::EthKeyCrypto(err)
 	}
 }
--- a/accounts/ethstore/src/ethkey.rs
+++ b/accounts/ethstore/src/ethkey.rs
@ -1,41 +0,0 @@
 // Copyright 2015-2019 Parity Technologies (UK) Ltd.
 // This file is part of Parity Ethereum.
 // Parity Ethereum is free software: you can redistribute it and/or modify
 // it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 // Parity Ethereum is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 // GNU General Public License for more details.
 // You should have received a copy of the GNU General Public License
 // along with Parity Ethereum.  If not, see <http://www.gnu.org/licenses/>.
 //! ethkey reexport to make documentation look pretty.
 pub use _ethkey::*;
 use json;
 impl Into<json::H160> for Address {
 	fn into(self) -> json::H160 {
 		let a: [u8; 20] = self.into();
 		From::from(a)
 	}
 }
 impl From<json::H160> for Address {
 	fn from(json: json::H160) -> Self {
 		let a: [u8; 20] = json.into();
 		From::from(a)
 	}
 }
 impl<'a> From<&'a json::H160> for Address {
 	fn from(json: &'a json::H160) -> Self {
 		let mut a = [0u8; 20];
 		a.copy_from_slice(json);
 		From::from(a)
 	}
 }
--- a/accounts/ethstore/src/ethstore.rs
+++ b/accounts/ethstore/src/ethstore.rs
@ -22,7 +22,8 @@ use std::time::{Instant, Duration};
 use crypto::KEY_ITERATIONS;
 use random::Random;
-use ethkey::{self, Signature, Password, Address, Message, Secret, Public, KeyPair, ExtendedKeyPair};
+use crypto::publickey::{Signature, Address, Message, Secret, Public, KeyPair, ExtendedKeyPair};
 use ethkey::Password;
 use accounts_dir::{KeyDirectory, VaultKeyDirectory, VaultKey, SetKeyError};
 use account::SafeAccount;
 use presale::PresaleWallet;
@ -442,13 +443,13 @@ impl EthMultiStore {
 			Derivation::Hierarchical(path) => {
 				for path_item in path {
 					extended = extended.derive(
-						if path_item.soft { ethkey::Derivation::Soft(path_item.index) }
+						if path_item.soft { crypto::publickey::Derivation::Soft(path_item.index) }
-						else { ethkey::Derivation::Hard(path_item.index) }
+						else { crypto::publickey::Derivation::Hard(path_item.index) }
 					)?;
 				}
 			},
-			Derivation::SoftHash(h256) => { extended = extended.derive(ethkey::Derivation::Soft(h256))?; }
+			Derivation::SoftHash(h256) => { extended = extended.derive(crypto::publickey::Derivation::Soft(h256))?; }
-			Derivation::HardHash(h256) => { extended = extended.derive(ethkey::Derivation::Hard(h256))?; }
+			Derivation::HardHash(h256) => { extended = extended.derive(crypto::publickey::Derivation::Hard(h256))?; }
 		}
 		Ok(extended)
 	}
@ -479,7 +480,7 @@ impl SimpleSecretStore for EthMultiStore {
 		let accounts = self.get_matching(&account_ref, password)?;
 		for account in accounts {
 			let extended = self.generate(account.crypto.secret(password)?, derivation)?;
-			return Ok(ethkey::public_to_address(extended.public().public()));
+			return Ok(crypto::publickey::public_to_address(extended.public().public()));
 		}
 		Err(Error::InvalidPassword)
 	}
@ -491,7 +492,7 @@ impl SimpleSecretStore for EthMultiStore {
 		for account in accounts {
 			let extended = self.generate(account.crypto.secret(password)?, derivation)?;
 			let secret = extended.secret().as_raw();
-			return Ok(ethkey::sign(&secret, message)?)
+			return Ok(crypto::publickey::sign(&secret, message)?)
 		}
 		Err(Error::InvalidPassword)
 	}
@ -690,7 +691,7 @@ mod tests {
 	extern crate tempdir;
 	use accounts_dir::{KeyDirectory, MemoryDirectory, RootDiskDirectory};
-	use ethkey::{Random, Generator, KeyPair};
+	use crypto::publickey::{Random, Generator, KeyPair};
 	use secret_store::{SimpleSecretStore, SecretStore, SecretVaultRef, StoreAccountRef, Derivation};
 	use super::{EthStore, EthMultiStore};
 	use self::tempdir::TempDir;
--- a/accounts/ethstore/src/import.rs
+++ b/accounts/ethstore/src/import.rs
@ -18,7 +18,7 @@ use std::collections::HashSet;
 use std::path::Path;
 use std::fs;
-use ethkey::Address;
+use crypto::publickey::Address;
 use accounts_dir::{KeyDirectory, RootDiskDirectory, DiskKeyFileManager, KeyFileManager};
 use dir;
 use Error;
--- a/accounts/ethstore/src/lib.rs
+++ b/accounts/ethstore/src/lib.rs
@ -33,7 +33,7 @@ extern crate tempdir;
 extern crate parity_crypto as crypto;
 extern crate ethereum_types;
-extern crate ethkey as _ethkey;
+extern crate ethkey as ethkey;
 extern crate parity_wordlist;
 #[macro_use]
@ -46,7 +46,6 @@ extern crate serde_derive;
 extern crate matches;
 pub mod accounts_dir;
 pub mod ethkey;
 mod account;
 mod json;
@ -72,4 +71,30 @@ pub use self::random::random_string;
 pub use self::parity_wordlist::random_phrase;
 /// An opaque wrapper for secret.
-pub struct OpaqueSecret(::ethkey::Secret);
+pub struct OpaqueSecret(crypto::publickey::Secret);
 // Additional converters for Address
 use crypto::publickey::Address;
 impl Into<json::H160> for Address {
 	fn into(self) -> json::H160 {
 		let a: [u8; 20] = self.into();
 		From::from(a)
 	}
 }
 impl From<json::H160> for Address {
 	fn from(json: json::H160) -> Self {
 		let a: [u8; 20] = json.into();
 		From::from(a)
 	}
 }
 impl<'a> From<&'a json::H160> for Address {
 	fn from(json: &'a json::H160) -> Self {
 		let mut a = [0u8; 20];
 		a.copy_from_slice(json);
 		From::from(a)
 	}
 }
--- a/accounts/ethstore/src/presale.rs
+++ b/accounts/ethstore/src/presale.rs
@ -17,7 +17,8 @@
 use std::fs;
 use std::path::Path;
 use json;
-use ethkey::{Address, Secret, KeyPair, Password};
+use crypto::publickey::{Address, Secret, KeyPair};
 use ethkey::Password;
 use crypto::{Keccak256, pbkdf2};
 use {crypto, Error};
@ -65,7 +66,7 @@ impl PresaleWallet {
 			.map_err(|_| Error::InvalidPassword)?;
 		let unpadded = &key[..len];
-		let secret = Secret::from_unsafe_slice(&unpadded.keccak256())?;
+		let secret = Secret::import_key(&unpadded.keccak256())?;
 		if let Ok(kp) = KeyPair::from_secret(secret) {
 			if kp.address() == self.address {
 				return Ok(kp)
--- a/accounts/ethstore/src/secret_store.rs
+++ b/accounts/ethstore/src/secret_store.rs
@ -17,7 +17,8 @@
 use std::hash::{Hash, Hasher};
 use std::path::PathBuf;
 use std::cmp::Ordering;
-use ethkey::{Address, Message, Signature, Secret, Password, Public};
+use crypto::publickey::{Address, Message, Signature, Secret, Public};
 use ethkey::Password;
 use Error;
 use json::{Uuid, OpaqueKeyFile};
 use ethereum_types::H256;
@ -110,7 +111,7 @@ pub trait SecretStore: SimpleSecretStore {
 	/// Signs a message with raw secret.
 	fn sign_with_secret(&self, secret: &OpaqueSecret, message: &Message) -> Result<Signature, Error> {
-		Ok(::ethkey::sign(&secret.0, message)?)
+		Ok(crypto::publickey::sign(&secret.0, message)?)
 	}
 	/// Imports presale wallet
--- a/accounts/ethstore/tests/api.rs
+++ b/accounts/ethstore/tests/api.rs
@ -17,11 +17,12 @@
 extern crate rand;
 extern crate ethstore;
 extern crate ethereum_types;
 extern crate parity_crypto;
 mod util;
 use ethstore::{EthStore, SimpleSecretStore, SecretVaultRef, StoreAccountRef};
-use ethstore::ethkey::{Random, Generator, Secret, KeyPair, verify_address};
+use parity_crypto::publickey::{Random, Generator, Secret, KeyPair, verify_address};
 use ethstore::accounts_dir::RootDiskDirectory;
 use util::TransientDir;
 use ethereum_types::Address;
--- a/accounts/src/account_data.rs
+++ b/accounts/src/account_data.rs
@ -21,7 +21,8 @@ use std::{
 	time::Instant,
 };
-use ethkey::{Address, Password};
+use parity_crypto::publickey::Address;
 use ethkey::Password;
 use serde_derive::{Serialize, Deserialize};
 use serde_json;
--- a/accounts/src/lib.rs
+++ b/accounts/src/lib.rs
@ -28,7 +28,8 @@ use self::stores::AddressBook;
 use std::collections::HashMap;
 use std::time::{Instant, Duration};
-use ethkey::{Address, Message, Public, Secret, Password, Random, Generator};
+use ethkey::Password;
 use parity_crypto::publickey::{Address, Message, Public, Secret, Random, Generator, Signature};
 use ethstore::accounts_dir::MemoryDirectory;
 use ethstore::{
 	SimpleSecretStore, SecretStore, EthStore, EthMultiStore,
@ -37,7 +38,6 @@ use ethstore::{
 use log::warn;
 use parking_lot::RwLock;
 pub use ethkey::Signature;
 pub use ethstore::{Derivation, IndexDerivation, KeyFile, Error};
 pub use self::account_data::AccountMeta;
@ -503,7 +503,7 @@ impl AccountProvider {
 mod tests {
 	use super::{AccountProvider, Unlock};
 	use std::time::{Duration, Instant};
-	use ethkey::{Generator, Random, Address};
+	use parity_crypto::publickey::{Generator, Random, Address};
 	use ethstore::{StoreAccountRef, Derivation};
 	use ethereum_types::H256;
--- a/accounts/src/stores.rs
+++ b/accounts/src/stores.rs
@ -20,7 +20,7 @@ use std::{fs, fmt, hash, ops};
 use std::collections::HashMap;
 use std::path::{Path, PathBuf};
-use ethkey::Address;
+use parity_crypto::publickey::Address;
 use log::{trace, warn};
 use crate::AccountMeta;
--- a/ethcore/Cargo.toml
+++ b/ethcore/Cargo.toml
@ -17,7 +17,6 @@ engine = { path = "./engine" }
 env_logger = { version = "0.5", optional = true }
 ethash = { path = "../ethash", optional = true }
 ethjson = { path = "../json", optional = true }
 ethkey = { path = "../accounts/ethkey", optional = true }
 ethcore-blockchain = { path = "./blockchain" }
 ethcore-call-contract = { path = "./call-contract" }
 ethcore-db = { path = "./db" }
@ -44,6 +43,7 @@ parity-bytes = "0.1"
 parking_lot = "0.9"
 pod = { path = "pod", optional = true }
 trie-db = "0.15.0"
 parity-crypto = { version = "0.4.2", features = ["publickey"], optional = true }
 patricia-trie-ethereum = { path = "../util/patricia-trie-ethereum" }
 rand = "0.7"
 rand_xorshift = "0.2"
@ -76,7 +76,7 @@ ethash = { path = "../ethash" }
 ethcore-accounts = { path = "../accounts" }
 ethcore-builtin = { path = "./builtin" }
 ethjson = { path = "../json", features = ["test-helpers"] }
-ethkey = { path = "../accounts/ethkey" }
+parity-crypto = { version = "0.4.2", features = ["publickey"] }
 fetch = { path = "../util/fetch" }
 kvdb-memorydb = "0.1.2"
 kvdb-rocksdb = "0.1.5"
@ -124,7 +124,7 @@ test-heavy = []
 test-helpers = [
    "blooms-db",
    "ethjson/test-helpers",
-    "ethkey",
+    "parity-crypto",
    "kvdb-memorydb",
    "kvdb-rocksdb",
    "macros",
--- a/ethcore/blockchain/Cargo.toml
+++ b/ethcore/blockchain/Cargo.toml
@ -29,7 +29,7 @@ triehash-ethereum = { version = "0.2",  path = "../../util/triehash-ethereum" }
 [dev-dependencies]
 env_logger = "0.5"
-ethkey = { path = "../../accounts/ethkey" }
+parity-crypto = { version = "0.4.2", features = ["publickey"] }
 rustc-hex = "1.0"
 tempdir = "0.3"
 kvdb-memorydb = "0.1.2"
--- a/ethcore/blockchain/src/blockchain.rs
+++ b/ethcore/blockchain/src/blockchain.rs
@ -1625,7 +1625,7 @@ mod tests {
 	use common_types::receipt::{Receipt, TransactionOutcome};
 	use common_types::transaction::{Transaction, Action};
 	use crate::generator::{BlockGenerator, BlockBuilder, BlockOptions};
-	use ethkey::Secret;
+	use parity_crypto::publickey::Secret;
 	use keccak_hash::keccak;
 	use rustc_hex::FromHex;
 	use tempdir::TempDir;
--- a/ethcore/builtin/Cargo.toml
+++ b/ethcore/builtin/Cargo.toml
@ -10,13 +10,12 @@ bn = { git = "https://github.com/paritytech/bn", default-features = false }
 common-types = { path = "../types" }
 ethereum-types = "0.8.0"
 ethjson = { path = "../../json" }
 ethkey = { path = "../../accounts/ethkey" }
 keccak-hash = "0.4.0"
 log = "0.4"
 num = { version = "0.1", default-features = false, features = ["bigint"] }
 parity-bytes = "0.1"
 eip-152 = { path = "../../util/EIP-152" }
-parity-crypto = "0.4.0"
+parity-crypto = { version = "0.4.2", features = ["publickey"] }
 byteorder = "1.3.2"
 [dev-dependencies]
--- a/ethcore/builtin/src/lib.rs
+++ b/ethcore/builtin/src/lib.rs
@ -28,7 +28,7 @@ use byteorder::{BigEndian, LittleEndian, ReadBytesExt};
 use common_types::errors::EthcoreError;
 use ethereum_types::{H256, U256};
 use ethjson;
-use ethkey::{Signature, recover as ec_recover};
+use parity_crypto::publickey::{Signature, recover as ec_recover};
 use keccak_hash::keccak;
 use log::{warn, trace};
 use num::{BigUint, Zero, One};
--- a/ethcore/engine/Cargo.toml
+++ b/ethcore/engine/Cargo.toml
@ -13,17 +13,19 @@ bytes = { package = "parity-bytes", version = "0.1.0" }
 client-traits = { path = "../client-traits" }
 common-types = { path = "../types" }
 ethereum-types = "0.8.0"
-ethkey = { path = "../../accounts/ethkey" }
+parity-crypto = { version = "0.4.2", features = ["publickey"] }
 machine = { path = "../machine" }
 vm = { path = "../vm" }
 # used from test-helpers
 accounts = { package = "ethcore-accounts", path = "../../accounts", optional = true }
 log = { version = "0.4.8", optional = true }
 ethkey = { path = "../../accounts/ethkey", optional = true }
 [dev-dependencies]
 accounts = { package = "ethcore-accounts", path = "../../accounts" }
 ethkey = { path = "../../accounts/ethkey" }
 log = "0.4.8"
 [features]
-test-helpers = ["accounts", "log"]
+test-helpers = ["accounts", "log", "ethkey"]
--- a/ethcore/engine/src/engine.rs
+++ b/ethcore/engine/src/engine.rs
@ -37,7 +37,7 @@ use common_types::{
 use client_traits::EngineClient;
 use ethereum_types::{H256, U256, Address};
-use ethkey::Signature;
+use parity_crypto::publickey::Signature;
 use machine::{
 	Machine,
 	executed_block::ExecutedBlock,
--- a/ethcore/engine/src/signer.rs
+++ b/ethcore/engine/src/signer.rs
@ -17,27 +17,27 @@
 //! A signer used by Engines which need to sign messages.
 use ethereum_types::{H256, Address};
-use ethkey::{self, Signature};
+use parity_crypto::publickey::{Signature, KeyPair, Error};
 /// Everything that an Engine needs to sign messages.
 pub trait EngineSigner: Send + Sync {
 	/// Sign a consensus message hash.
-	fn sign(&self, hash: H256) -> Result<Signature, ethkey::Error>;
+	fn sign(&self, hash: H256) -> Result<Signature, Error>;
 	/// Signing address
 	fn address(&self) -> Address;
 }
 /// Creates a new `EngineSigner` from given key pair.
-pub fn from_keypair(keypair: ethkey::KeyPair) -> Box<dyn EngineSigner> {
+pub fn from_keypair(keypair: KeyPair) -> Box<dyn EngineSigner> {
 	Box::new(Signer(keypair))
 }
-struct Signer(ethkey::KeyPair);
+struct Signer(KeyPair);
 impl EngineSigner for Signer {
-	fn sign(&self, hash: H256) -> Result<Signature, ethkey::Error> {
+	fn sign(&self, hash: H256) -> Result<Signature, Error> {
-		ethkey::sign(self.0.secret(), &hash)
+		parity_crypto::publickey::sign(self.0.secret(), &hash)
 	}
 	fn address(&self) -> Address {
--- a/ethcore/engine/src/test_helpers.rs
+++ b/ethcore/engine/src/test_helpers.rs
@ -19,25 +19,26 @@
 use std::sync::Arc;
 use ethereum_types::{Address, H256};
-use ethkey::{Password, Signature};
+use ethkey::Password;
 use parity_crypto::publickey::{Signature, Error};
 use log::warn;
 use accounts::{self, AccountProvider, SignError};
 use crate::signer::EngineSigner;
 impl EngineSigner for (Arc<AccountProvider>, Address, Password) {
-	fn sign(&self, hash: H256) -> Result<Signature, ethkey::Error> {
+	fn sign(&self, hash: H256) -> Result<Signature, Error> {
 		match self.0.sign(self.1, Some(self.2.clone()), hash) {
 			Err(SignError::NotUnlocked) => unreachable!(),
-			Err(SignError::NotFound) => Err(ethkey::Error::InvalidAddress),
+			Err(SignError::NotFound) => Err(Error::InvalidAddress),
-			Err(SignError::SStore(accounts::Error::EthKey(err))) => Err(err),
+			Err(SignError::SStore(accounts::Error::EthCrypto(err))) => Err(Error::Custom(err.to_string())),
-			Err(SignError::SStore(accounts::Error::EthKeyCrypto(err))) => {
+			Err(SignError::SStore(accounts::Error::EthPublicKeyCrypto(err))) => {
 				warn!("Low level crypto error: {:?}", err);
-				Err(ethkey::Error::InvalidSecret)
+				Err(Error::InvalidSecretKey)
 			},
 			Err(SignError::SStore(err)) => {
 				warn!("Error signing for engine: {:?}", err);
-				Err(ethkey::Error::InvalidSignature)
+				Err(Error::InvalidSignature)
 			},
 			Ok(ok) => Ok(ok),
 		}
--- a/ethcore/engines/authority-round/Cargo.toml
+++ b/ethcore/engines/authority-round/Cargo.toml
@ -12,7 +12,7 @@ client-traits = { path = "../../client-traits" }
 common-types = { path = "../../types" }
 ethereum-types = "0.8.0"
 ethjson = { path = "../../../json" }
-ethkey = { path = "../../../accounts/ethkey" }
+parity-crypto = { version = "0.4.2", features = ["publickey"] }
 engine = { path = "../../engine" }
 io = { package = "ethcore-io", path = "../../../util/io" }
 itertools = "0.5"
--- a/ethcore/engines/authority-round/src/lib.rs
+++ b/ethcore/engines/authority-round/src/lib.rs
@ -51,7 +51,7 @@ use macros::map;
 use keccak_hash::keccak;
 use log::{info, debug, error, trace, warn};
 use engine::signer::EngineSigner;
-use ethkey::{self, Signature};
+use parity_crypto::publickey::Signature;
 use io::{IoContext, IoHandler, TimerToken, IoService};
 use itertools::{self, Itertools};
 use rlp::{encode, Decodable, DecoderError, Encodable, RlpStream, Rlp};
@ -385,14 +385,14 @@ impl EmptyStep {
 		let message = keccak(empty_step_rlp(self.step, &self.parent_hash));
 		let correct_proposer = step_proposer(validators, &self.parent_hash, self.step);
-		ethkey::verify_address(&correct_proposer, &self.signature.into(), &message)
+		parity_crypto::publickey::verify_address(&correct_proposer, &self.signature.into(), &message)
 			.map_err(|e| e.into())
 	}
 	fn author(&self) -> Result<Address, Error> {
 		let message = keccak(empty_step_rlp(self.step, &self.parent_hash));
-		let public = ethkey::recover(&self.signature.into(), &message)?;
+		let public = parity_crypto::publickey::recover(&self.signature.into(), &message)?;
-		Ok(ethkey::public_to_address(&public))
+		Ok(parity_crypto::publickey::public_to_address(&public))
 	}
 	fn sealed(&self) -> SealedEmptyStep {
@ -673,7 +673,7 @@ fn verify_external(header: &Header, validators: &dyn ValidatorSet, empty_steps_t
 		};
 		let header_seal_hash = header_seal_hash(header, empty_steps_rlp);
-		!ethkey::verify_address(&correct_proposer, &proposer_signature, &header_seal_hash)?
+		!parity_crypto::publickey::verify_address(&correct_proposer, &proposer_signature, &header_seal_hash)?
 	};
 	if is_invalid_proposer {
@ -1663,7 +1663,7 @@ impl Engine for AuthorityRound {
 	fn sign(&self, hash: H256) -> Result<Signature, Error> {
 		Ok(self.signer.read()
 			.as_ref()
-			.ok_or(ethkey::Error::InvalidAddress)?
+			.ok_or(parity_crypto::publickey::Error::InvalidAddress)?
 			.sign(hash)?
 		)
 	}
@ -1703,7 +1703,7 @@ mod tests {
 	use keccak_hash::keccak;
 	use accounts::AccountProvider;
 	use ethereum_types::{Address, H520, H256, U256};
-	use ethkey::Signature;
+	use parity_crypto::publickey::Signature;
 	use common_types::{
 		header::Header,
 		engines::{Seal, params::CommonParams},
@ -2112,7 +2112,7 @@ mod tests {
 		SealedEmptyStep { signature, step }
 	}
-	fn set_empty_steps_seal(header: &mut Header, step: u64, block_signature: &ethkey::Signature, empty_steps: &[SealedEmptyStep]) {
+	fn set_empty_steps_seal(header: &mut Header, step: u64, block_signature: &Signature, empty_steps: &[SealedEmptyStep]) {
 		header.set_seal(vec![
 			encode(&(step as usize)),
 			encode(&(&**block_signature as &[u8])),
--- a/ethcore/engines/basic-authority/Cargo.toml
+++ b/ethcore/engines/basic-authority/Cargo.toml
@ -12,7 +12,7 @@ common-types = { path = "../../types" }
 engine = { path = "../../engine" }
 ethereum-types = "0.8.0"
 ethjson = { path = "../../../json" }
-ethkey = { path = "../../../accounts/ethkey" }
+parity-crypto = { version = "0.4.2", features = ["publickey"] }
 log = "0.4.8"
 machine = { path = "../../machine" }
 parking_lot = "0.9"
--- a/ethcore/engines/basic-authority/src/lib.rs
+++ b/ethcore/engines/basic-authority/src/lib.rs
@ -34,7 +34,7 @@ use client_traits::EngineClient;
 use ethereum_types::{H256, H520};
 use parking_lot::RwLock;
 use engine::{Engine, ConstructedVerifier, signer::EngineSigner};
-use ethkey::{self, Signature};
+use parity_crypto::publickey::Signature;
 use ethjson;
 use log::trace;
 use machine::{Machine, executed_block::ExecutedBlock};
@ -69,7 +69,7 @@ impl engine::EpochVerifier for EpochVerifier {
 fn verify_external(header: &Header, validators: &dyn ValidatorSet) -> Result<(), Error> {
 	// Check if the signature belongs to a validator, can depend on parent state.
 	let sig = Rlp::new(&header.seal()[0]).as_val::<H520>()?;
-	let signer = ethkey::public_to_address(&ethkey::recover(&sig.into(), &header.bare_hash())?);
+	let signer = parity_crypto::publickey::public_to_address(&parity_crypto::publickey::recover(&sig.into(), &header.bare_hash())?);
 	if *header.author() != signer {
 		return Err(EngineError::NotAuthorized(*header.author()).into())
@ -201,7 +201,7 @@ impl Engine for BasicAuthority {
 	fn sign(&self, hash: H256) -> Result<Signature, Error> {
 		Ok(self.signer.read()
 			.as_ref()
-			.ok_or_else(|| ethkey::Error::InvalidAddress)?
+			.ok_or_else(|| parity_crypto::publickey::Error::InvalidAddress)?
 			.sign(hash)?
 		)
 	}
--- a/ethcore/engines/clique/Cargo.toml
+++ b/ethcore/engines/clique/Cargo.toml
@ -11,7 +11,7 @@ client-traits = { path = "../../client-traits" }
 common-types = { path = "../../types" }
 ethereum-types = "0.8.0"
 ethjson = { path = "../../../json" }
-ethkey = { path = "../../../accounts/ethkey" }
+parity-crypto = { version = "0.4.2", features = ["publickey"] }
 engine = { path = "../../engine" }
 keccak-hash = "0.4.0"
 lazy_static = "1.3.0"
--- a/ethcore/engines/clique/src/lib.rs
+++ b/ethcore/engines/clique/src/lib.rs
@ -72,7 +72,7 @@ use engine::{
 	signer::EngineSigner,
 };
 use ethereum_types::{Address, H64, H160, H256, U256};
-use ethkey::Signature;
+use parity_crypto::publickey::Signature;
 use keccak_hash::KECCAK_EMPTY_LIST_RLP;
 use log::{trace, warn};
 use lru_cache::LruCache;
--- a/ethcore/engines/clique/src/tests.rs
+++ b/ethcore/engines/clique/src/tests.rs
@ -26,7 +26,7 @@ use ethcore::{
 };
 use engine::Engine;
 use ethereum_types::{Address, H256};
-use ethkey::{Secret, KeyPair};
+use parity_crypto::publickey::{Secret, KeyPair};
 use state_db::StateDB;
 use super::*;
@ -183,7 +183,7 @@ impl CliqueTester {
 			b.header.set_difficulty(difficulty);
 			b.header.set_seal(seal);
-			let sign = ethkey::sign(self.signers[&signer].secret(), &b.header.hash()).unwrap();
+			let sign = parity_crypto::publickey::sign(self.signers[&signer].secret(), &b.header.hash()).unwrap();
 			let mut extra_data = b.header.extra_data().clone();
 			extra_data.extend_from_slice(&*sign);
 			b.header.set_extra_data(extra_data);
--- a/ethcore/engines/clique/src/util.rs
+++ b/ethcore/engines/clique/src/util.rs
@ -21,7 +21,7 @@ use common_types::{
 	errors::{EthcoreError as Error, EngineError},
 };
 use ethereum_types::{Address, H256};
-use ethkey::{public_to_address, recover as ec_recover, Signature};
+use parity_crypto::publickey::{public_to_address, recover as ec_recover, Signature};
 use lazy_static::lazy_static;
 use lru_cache::LruCache;
 use parking_lot::RwLock;
--- a/ethcore/engines/validator-set/Cargo.toml
+++ b/ethcore/engines/validator-set/Cargo.toml
@ -36,7 +36,7 @@ call-contract = { package = "ethcore-call-contract", path = "../../call-contract
 engine = { path = "../../engine", features = ["test-helpers"] }
 env_logger = "0.6.2"
 ethcore = { path = "../..", features = ["test-helpers"] }
-ethkey = { path = "../../../accounts/ethkey" }
+parity-crypto = { version = "0.4.2", features = ["publickey"] }
 keccak-hash = "0.4.0"
 rustc-hex = "1.0"
 spec = { path = "../../spec" }
--- a/ethcore/engines/validator-set/src/multi.rs
+++ b/ethcore/engines/validator-set/src/multi.rs
@ -168,7 +168,7 @@ mod tests {
 		test_helpers::{generate_dummy_client_with_spec, generate_dummy_client_with_spec_and_data},
 	};
 	use ethereum_types::Address;
-	use ethkey::Secret;
+	use parity_crypto::publickey::Secret;
 	use keccak_hash::keccak;
 	use spec;
--- a/ethcore/engines/validator-set/src/safe_contract.rs
+++ b/ethcore/engines/validator-set/src/safe_contract.rs
@ -470,7 +470,7 @@ mod tests {
 		miner::{self, MinerService},
 		test_helpers::{generate_dummy_client_with_spec, generate_dummy_client_with_spec_and_data}
 	};
-	use ethkey::Secret;
+	use parity_crypto::publickey::Secret;
 	use ethereum_types::Address;
 	use keccak_hash::keccak;
 	use rustc_hex::FromHex;
--- a/ethcore/executive-state/Cargo.toml
+++ b/ethcore/executive-state/Cargo.toml
@ -24,7 +24,7 @@ vm = { path = "../vm" }
 [dev-dependencies]
 env_logger = "0.5"
 ethcore = { path = "..", features = ["test-helpers"] }
-ethkey = { path = "../../accounts/ethkey" }
+parity-crypto = { version = "0.4.2", features = ["publickey"] }
 evm = { path = "../evm" }
 keccak-hash = "0.4.0"
 pod = { path = "../pod" }
--- a/ethcore/executive-state/src/lib.rs
+++ b/ethcore/executive-state/src/lib.rs
@ -270,7 +270,7 @@ mod tests {
 	use account_state::{Account, CleanupMode};
 	use common_types::transaction::*;
 	use keccak_hash::{keccak, KECCAK_NULL_RLP};
-	use ethkey::Secret;
+	use parity_crypto::publickey::Secret;
 	use ethereum_types::{H256, U256, Address, BigEndianHash};
 	use ethcore::{
 		test_helpers::{get_temp_state, get_temp_state_db}
--- a/ethcore/machine/Cargo.toml
+++ b/ethcore/machine/Cargo.toml
@ -37,7 +37,7 @@ common-types = { path = "../types", features = ["test-helpers"] }
 ethcore = { path = "../", features = ["test-helpers"] }
 ethcore-io = { path = "../../util/io" }
 ethjson = { path = "../../json" }
-ethkey = { path = "../../accounts/ethkey" }
+parity-crypto = { version = "0.4.2", features = ["publickey"] }
 macros = { path = "../../util/macros" }
 rustc-hex = "1.0"
 spec = { path = "../spec" }
--- a/ethcore/machine/src/executive.rs
+++ b/ethcore/machine/src/executive.rs
@ -1233,7 +1233,7 @@ mod tests {
 		errors::ExecutionError,
 		transaction::{Action, Transaction},
 	};
-	use ethkey::{Generator, Random};
+	use parity_crypto::publickey::{Generator, Random};
 	use evm::{Factory, VMType, evm_test, evm_test_ignore};
 	use macros::vec_into;
 	use vm::{ActionParams, ActionValue, CallType, EnvInfo, CreateContractAddress};
--- a/ethcore/machine/src/machine.rs
+++ b/ethcore/machine/src/machine.rs
@ -435,7 +435,7 @@ mod tests {
 		header.set_number(15);
 		let res = machine.verify_transaction_basic(&transaction, &header);
-		assert_eq!(res, Err(transaction::Error::InvalidSignature("Crypto error (Invalid EC signature)".into())));
+		assert_eq!(res, Err(transaction::Error::InvalidSignature("invalid EC signature".into())));
 	}
 	#[test]
--- a/ethcore/machine/src/tx_filter.rs
+++ b/ethcore/machine/src/tx_filter.rs
@ -178,7 +178,7 @@ mod test {
 		miner::Miner,
 		test_helpers,
 	};
-	use ethkey::{Secret, KeyPair};
+	use parity_crypto::publickey::{Secret, KeyPair};
 	use ethcore_io::IoChannel;
 	use spec::Spec;
@ -200,13 +200,13 @@ mod test {
 			Arc::new(Miner::new_for_tests(&spec, None)),
 			IoChannel::disconnected(),
 		).unwrap();
-		let key1 = KeyPair::from_secret(Secret::from("0000000000000000000000000000000000000000000000000000000000000001")).unwrap();
+		let key1 = KeyPair::from_secret(Secret::from_str("0000000000000000000000000000000000000000000000000000000000000001").unwrap()).unwrap();
-		let key2 = KeyPair::from_secret(Secret::from("0000000000000000000000000000000000000000000000000000000000000002")).unwrap();
+		let key2 = KeyPair::from_secret(Secret::from_str("0000000000000000000000000000000000000000000000000000000000000002").unwrap()).unwrap();
-		let key3 = KeyPair::from_secret(Secret::from("0000000000000000000000000000000000000000000000000000000000000003")).unwrap();
+		let key3 = KeyPair::from_secret(Secret::from_str("0000000000000000000000000000000000000000000000000000000000000003").unwrap()).unwrap();
-		let key4 = KeyPair::from_secret(Secret::from("0000000000000000000000000000000000000000000000000000000000000004")).unwrap();
+		let key4 = KeyPair::from_secret(Secret::from_str("0000000000000000000000000000000000000000000000000000000000000004").unwrap()).unwrap();
-		let key5 = KeyPair::from_secret(Secret::from("0000000000000000000000000000000000000000000000000000000000000005")).unwrap();
+		let key5 = KeyPair::from_secret(Secret::from_str("0000000000000000000000000000000000000000000000000000000000000005").unwrap()).unwrap();
-		let key6 = KeyPair::from_secret(Secret::from("0000000000000000000000000000000000000000000000000000000000000006")).unwrap();
+		let key6 = KeyPair::from_secret(Secret::from_str("0000000000000000000000000000000000000000000000000000000000000006").unwrap()).unwrap();
-		let key7 = KeyPair::from_secret(Secret::from("0000000000000000000000000000000000000000000000000000000000000007")).unwrap();
+		let key7 = KeyPair::from_secret(Secret::from_str("0000000000000000000000000000000000000000000000000000000000000007").unwrap()).unwrap();
 		let filter = TransactionFilter::from_params(spec.params()).unwrap();
 		let mut basic_tx = Transaction::default();
@ -279,7 +279,7 @@ mod test {
 			Arc::new(Miner::new_for_tests(&spec, None)),
 			IoChannel::disconnected(),
 		).unwrap();
-		let key1 = KeyPair::from_secret(Secret::from("0000000000000000000000000000000000000000000000000000000000000001")).unwrap();
+		let key1 = KeyPair::from_secret(Secret::from_str("0000000000000000000000000000000000000000000000000000000000000001").unwrap()).unwrap();
 		// The only difference to version 2 is that the contract now knows the transaction's gas price and data.
 		// So we only test those: The contract allows only transactions with either nonzero gas price or short data.
@ -321,10 +321,10 @@ mod test {
 			Arc::new(Miner::new_for_tests(&spec, None)),
 			IoChannel::disconnected(),
 		).unwrap();
-		let key1 = KeyPair::from_secret(Secret::from("0000000000000000000000000000000000000000000000000000000000000001")).unwrap();
+		let key1 = KeyPair::from_secret(Secret::from_str("0000000000000000000000000000000000000000000000000000000000000001").unwrap()).unwrap();
-		let key2 = KeyPair::from_secret(Secret::from("0000000000000000000000000000000000000000000000000000000000000002")).unwrap();
+		let key2 = KeyPair::from_secret(Secret::from_str("0000000000000000000000000000000000000000000000000000000000000002").unwrap()).unwrap();
-		let key3 = KeyPair::from_secret(Secret::from("0000000000000000000000000000000000000000000000000000000000000003")).unwrap();
+		let key3 = KeyPair::from_secret(Secret::from_str("0000000000000000000000000000000000000000000000000000000000000003").unwrap()).unwrap();
-		let key4 = KeyPair::from_secret(Secret::from("0000000000000000000000000000000000000000000000000000000000000004")).unwrap();
+		let key4 = KeyPair::from_secret(Secret::from_str("0000000000000000000000000000000000000000000000000000000000000004").unwrap()).unwrap();
 		let filter = TransactionFilter::from_params(spec.params()).unwrap();
 		let mut basic_tx = Transaction::default();
--- a/ethcore/private-tx/Cargo.toml
+++ b/ethcore/private-tx/Cargo.toml
@ -20,7 +20,6 @@ ethcore-io = { path = "../../util/io" }
 ethcore-miner = { path = "../../miner" }
 ethereum-types = "0.8.0"
 ethjson = { path = "../../json" }
 ethkey = { path = "../../accounts/ethkey" }
 fetch = { path = "../../util/fetch" }
 futures = "0.1"
 parity-util-mem = "0.2.0"
@ -32,7 +31,7 @@ log = "0.4"
 machine = { path = "../machine" }
 journaldb = { path = "../../util/journaldb" }
 parity-bytes = "0.1"
-parity-crypto = "0.4.0"
+parity-crypto = { version = "0.4.2", features = ["publickey"] }
 parking_lot = "0.9"
 trie-db = "0.15.0"
 patricia-trie-ethereum = { path = "../../util/patricia-trie-ethereum" }
--- a/ethcore/private-tx/src/encryptor.rs
+++ b/ethcore/private-tx/src/encryptor.rs
@ -26,7 +26,7 @@ use std::collections::hash_map::Entry;
 use parking_lot::Mutex;
 use ethereum_types::{H128, H256, Address};
 use ethjson;
-use ethkey::{Signature, Public};
+use crypto::publickey::{Signature, Public};
 use crypto;
 use futures::Future;
 use fetch::{Fetch, Client as FetchClient, Method, BodyReader, Request};
--- a/ethcore/private-tx/src/error.rs
+++ b/ethcore/private-tx/src/error.rs
@ -23,8 +23,7 @@ use types::{
 	errors::{EthcoreError, ExecutionError},
 	transaction::Error as TransactionError,
 };
-use ethkey::Error as KeyError;
+use crypto::publickey::Error as CryptoError;
 use ethkey::crypto::Error as CryptoError;
 use txpool::VerifiedTransaction;
 use private_transactions::VerifiedPrivateTransaction;
 use serde_json::{Error as SerdeError};
@ -123,9 +122,6 @@ pub enum Error {
 	/// VM execution error.
 	#[display(fmt = "VM execution error {}", _0)]
 	Execution(ExecutionError),
 	/// General signing error.
 	#[display(fmt = "General signing error {}", _0)]
 	Key(KeyError),
 	/// Error of transactions processing.
 	#[display(fmt = "Error of transactions processing {}", _0)]
 	Transaction(TransactionError),
@ -147,7 +143,6 @@ impl error::Error for Error {
 			Error::Json(e) => Some(e),
 			Error::Crypto(e) => Some(e),
 			Error::Execution(e) => Some(e),
 			Error::Key(e) => Some(e),
 			Error::Transaction(e) => Some(e),
 			Error::Ethcore(e) => Some(e),
 			_ => None,
@ -167,12 +162,6 @@ impl From<std::io::Error> for Error {
 	}
 }
 impl From<KeyError> for Error {
 	fn from(err: KeyError) -> Self {
 		Error::Key(err).into()
 	}
 }
 impl From<CryptoError> for Error {
 	fn from(err: CryptoError) -> Self {
 		Error::Crypto(err).into()
--- a/ethcore/private-tx/src/key_server_keys.rs
+++ b/ethcore/private-tx/src/key_server_keys.rs
@ -145,7 +145,8 @@ impl KeyProvider for StoringKeyProvider {
 #[cfg(test)]
 mod tests {
 	use std::sync::Arc;
-	use ethkey::{Secret, KeyPair};
+	use std::str::FromStr;
 	use crypto::publickey::{Secret, KeyPair};
 	use bytes::Bytes;
 	use super::*;
 	use registrar::RegistrarClient;
@ -185,7 +186,7 @@ mod tests {
 	#[test]
 	fn should_update_acl_contract() {
-		let key = KeyPair::from_secret(Secret::from("0000000000000000000000000000000000000000000000000000000000000011")).unwrap();
+		let key = KeyPair::from_secret(Secret::from_str("0000000000000000000000000000000000000000000000000000000000000011").unwrap()).unwrap();
 		let client = DummyRegistryClient::new(Some(key.address()));
 		let keys_data = SecretStoreKeys::new(Arc::new(client), None);
 		keys_data.update_acl_contract();
--- a/ethcore/private-tx/src/lib.rs
+++ b/ethcore/private-tx/src/lib.rs
@ -36,7 +36,6 @@ extern crate ethcore_io as io;
 extern crate ethcore_miner;
 extern crate ethereum_types;
 extern crate ethjson;
 extern crate ethkey;
 extern crate fetch;
 extern crate futures;
 extern crate parity_util_mem;
@ -95,7 +94,7 @@ use hash::keccak;
 use rlp::*;
 use parking_lot::RwLock;
 use bytes::Bytes;
-use ethkey::{Signature, recover, public_to_address};
+use crypto::publickey::{Signature, recover, public_to_address, Message, KeyPair};
 use io::{IoChannel, IoHandler, IoContext, TimerToken};
 use machine::{
 	executive::{Executive, TransactOptions, contract_address as ethcore_contract_address},
@ -172,7 +171,7 @@ pub trait Signer: Send + Sync {
 	/// Decrypt payload using private key of given address.
 	fn decrypt(&self, account: Address, shared_mac: &[u8], payload: &[u8]) -> Result<Vec<u8>, Error>;
 	/// Sign given hash using provided account.
-	fn sign(&self, account: Address, hash: ethkey::Message) -> Result<Signature, Error>;
+	fn sign(&self, account: Address, hash: Message) -> Result<Signature, Error>;
 }
 /// Signer implementation that errors on any request.
@ -182,22 +181,22 @@ impl Signer for DummySigner {
 		Err("Decrypting is not supported.".to_owned())?
 	}
-	fn sign(&self, _account: Address, _hash: ethkey::Message) -> Result<Signature, Error> {
+	fn sign(&self, _account: Address, _hash: Message) -> Result<Signature, Error> {
 		Err("Signing is not supported.".to_owned())?
 	}
 }
 /// Signer implementation using multiple keypairs
-pub struct KeyPairSigner(pub Vec<ethkey::KeyPair>);
+pub struct KeyPairSigner(pub Vec<KeyPair>);
 impl Signer for KeyPairSigner {
 	fn decrypt(&self, account: Address, shared_mac: &[u8], payload: &[u8]) -> Result<Vec<u8>, Error> {
-		let kp = self.0.iter().find(|k| k.address() == account).ok_or(ethkey::Error::InvalidAddress)?;
+		let kp = self.0.iter().find(|k| k.address() == account).ok_or(crypto::publickey::Error::InvalidAddress)?;
-		Ok(ethkey::crypto::ecies::decrypt(kp.secret(), shared_mac, payload)?)
+		Ok(crypto::publickey::ecies::decrypt(kp.secret(), shared_mac, payload)?)
 	}
-	fn sign(&self, account: Address, hash: ethkey::Message) -> Result<Signature, Error> {
+	fn sign(&self, account: Address, hash: Message) -> Result<Signature, Error> {
-		let kp = self.0.iter().find(|k| k.address() == account).ok_or(ethkey::Error::InvalidAddress)?;
+		let kp = self.0.iter().find(|k| k.address() == account).ok_or(crypto::publickey::Error::InvalidAddress)?;
-		Ok(ethkey::sign(kp.secret(), &hash)?)
+		Ok(crypto::publickey::sign(kp.secret(), &hash)?)
 	}
 }
--- a/ethcore/private-tx/src/messages.rs
+++ b/ethcore/private-tx/src/messages.rs
@ -18,7 +18,7 @@ use ethereum_types::{H256, U256, Address, BigEndianHash};
 use bytes::Bytes;
 use hash::keccak;
 use rlp::Encodable;
-use ethkey::Signature;
+use crypto::publickey::Signature;
 use types::transaction::signature::{add_chain_replay_protection, check_replay_protection};
 /// Message with private transaction encrypted
--- a/ethcore/private-tx/src/private_transactions.rs
+++ b/ethcore/private-tx/src/private_transactions.rs
@ -22,7 +22,7 @@ use bytes::Bytes;
 use ethcore_miner::pool;
 use ethereum_types::{H256, U256, Address};
 use parity_util_mem::MallocSizeOfExt;
-use ethkey::Signature;
+use crypto::publickey::Signature;
 use messages::PrivateTransaction;
 use parking_lot::RwLock;
 use types::transaction::{UnverifiedTransaction, SignedTransaction};
--- a/ethcore/private-tx/tests/private_contract.rs
+++ b/ethcore/private-tx/tests/private_contract.rs
@ -22,7 +22,7 @@ extern crate env_logger;
 extern crate ethcore;
 extern crate ethcore_io;
 extern crate ethcore_private_tx;
-extern crate ethkey;
+extern crate parity_crypto;
 extern crate keccak_hash as hash;
 extern crate rustc_hex;
 extern crate machine;
@ -32,6 +32,7 @@ extern crate spec;
 extern crate log;
 use std::sync::Arc;
 use std::str::FromStr;
 use rustc_hex::{FromHex, ToHex};
 use types::ids::BlockId;
 use types::transaction::{Transaction, Action};
@ -40,7 +41,7 @@ use ethcore::{
 	miner::Miner,
 };
 use client_traits::BlockChainClient;
-use ethkey::{Secret, KeyPair, Signature};
+use parity_crypto::publickey::{Secret, KeyPair, Signature};
 use machine::executive::contract_address;
 use hash::keccak;
@ -52,10 +53,10 @@ fn private_contract() {
 	let _ = ::env_logger::try_init();
 	let client = generate_dummy_client(0);
 	let chain_id = client.signing_chain_id();
-	let key1 = KeyPair::from_secret(Secret::from("0000000000000000000000000000000000000000000000000000000000000011")).unwrap();
+	let key1 = KeyPair::from_secret(Secret::from_str("0000000000000000000000000000000000000000000000000000000000000011").unwrap()).unwrap();
-	let _key2 = KeyPair::from_secret(Secret::from("0000000000000000000000000000000000000000000000000000000000000012")).unwrap();
+	let _key2 = KeyPair::from_secret(Secret::from_str("0000000000000000000000000000000000000000000000000000000000000012").unwrap()).unwrap();
-	let key3 = KeyPair::from_secret(Secret::from("0000000000000000000000000000000000000000000000000000000000000013")).unwrap();
+	let key3 = KeyPair::from_secret(Secret::from_str("0000000000000000000000000000000000000000000000000000000000000013").unwrap()).unwrap();
-	let key4 = KeyPair::from_secret(Secret::from("0000000000000000000000000000000000000000000000000000000000000014")).unwrap();
+	let key4 = KeyPair::from_secret(Secret::from_str("0000000000000000000000000000000000000000000000000000000000000014").unwrap()).unwrap();
 	let signer = Arc::new(ethcore_private_tx::KeyPairSigner(vec![key1.clone(), key3.clone(), key4.clone()]));
@ -118,7 +119,7 @@ fn private_contract() {
 	let private_state = pm.execute_private_transaction(BlockId::Latest, &private_tx).unwrap();
 	let nonced_state_hash = pm.calculate_state_hash(&private_state, private_contract_nonce);
 	let signatures: Vec<_> = [&key3, &key4].iter().map(|k|
-		Signature::from(::ethkey::sign(&k.secret(), &nonced_state_hash).unwrap().into_electrum())).collect();
+		Signature::from(parity_crypto::publickey::sign(&k.secret(), &nonced_state_hash).unwrap().into_electrum())).collect();
 	let public_tx = pm.public_transaction(private_state, &private_tx, &signatures, 1.into(), 0.into()).unwrap();
 	let public_tx = public_tx.sign(&key1.secret(), chain_id);
 	push_block_with_transactions(&client, &[public_tx]);
@ -145,7 +146,7 @@ fn private_contract() {
 	let private_state = pm.execute_private_transaction(BlockId::Latest, &private_tx).unwrap();
 	let private_state_hash = keccak(&private_state);
 	let signatures: Vec<_> = [&key4].iter().map(|k|
-		Signature::from(::ethkey::sign(&k.secret(), &private_state_hash).unwrap().into_electrum())).collect();
+		Signature::from(parity_crypto::publickey::sign(&k.secret(), &private_state_hash).unwrap().into_electrum())).collect();
 	let public_tx = pm.public_transaction(private_state, &private_tx, &signatures, 2.into(), 0.into()).unwrap();
 	let public_tx = public_tx.sign(&key1.secret(), chain_id);
 	push_block_with_transactions(&client, &[public_tx]);
@ -191,10 +192,10 @@ fn call_other_private_contract() {
 	// Create client and provider
 	let client = generate_dummy_client(0);
 	let chain_id = client.signing_chain_id();
-	let key1 = KeyPair::from_secret(Secret::from("0000000000000000000000000000000000000000000000000000000000000011")).unwrap();
+	let key1 = KeyPair::from_secret(Secret::from_str("0000000000000000000000000000000000000000000000000000000000000011").unwrap()).unwrap();
-	let _key2 = KeyPair::from_secret(Secret::from("0000000000000000000000000000000000000000000000000000000000000012")).unwrap();
+	let _key2 = KeyPair::from_secret(Secret::from_str("0000000000000000000000000000000000000000000000000000000000000012").unwrap()).unwrap();
-	let key3 = KeyPair::from_secret(Secret::from("0000000000000000000000000000000000000000000000000000000000000013")).unwrap();
+	let key3 = KeyPair::from_secret(Secret::from_str("0000000000000000000000000000000000000000000000000000000000000013").unwrap()).unwrap();
-	let key4 = KeyPair::from_secret(Secret::from("0000000000000000000000000000000000000000000000000000000000000014")).unwrap();
+	let key4 = KeyPair::from_secret(Secret::from_str("0000000000000000000000000000000000000000000000000000000000000014").unwrap()).unwrap();
 	let signer = Arc::new(ethcore_private_tx::KeyPairSigner(vec![key1.clone(), key3.clone(), key4.clone()]));
 	let config = ProviderConfig{
@ -268,7 +269,7 @@ fn call_other_private_contract() {
 	let private_state = pm.execute_private_transaction(BlockId::Latest, &private_tx).unwrap();
 	let nonced_state_hash = pm.calculate_state_hash(&private_state, private_contract_nonce);
 	let signatures: Vec<_> = [&key3, &key4].iter().map(|k|
-		Signature::from(::ethkey::sign(&k.secret(), &nonced_state_hash).unwrap().into_electrum())).collect();
+		Signature::from(parity_crypto::publickey::sign(&k.secret(), &nonced_state_hash).unwrap().into_electrum())).collect();
 	let public_tx = pm.public_transaction(private_state, &private_tx, &signatures, 2.into(), 0.into()).unwrap();
 	let public_tx = public_tx.sign(&key1.secret(), chain_id);
 	push_block_with_transactions(&client, &[public_tx]);
--- a/ethcore/snapshot/snapshot-tests/Cargo.toml
+++ b/ethcore/snapshot/snapshot-tests/Cargo.toml
@ -18,7 +18,6 @@ ethcore = { path = "../..", features = ["test-helpers"] }
 ethcore-db = { path = "../../db" }
 ethcore-io = { path = "../../../util/io" }
 ethereum-types = "0.8.0"
 ethkey = { path = "../../../accounts/ethkey" }
 ethtrie  = { package = "patricia-trie-ethereum", path = "../../../util/patricia-trie-ethereum" }
 hash-db = "0.15.0"
 journaldb = { path = "../../../util/journaldb" }
@ -28,6 +27,7 @@ kvdb = "0.1"
 kvdb-rocksdb = { version = "0.1.5" }
 log = "0.4.8"
 parking_lot = "0.9"
 parity-crypto = { version = "0.4.2", features = ["publickey"] }
 rand = "0.7"
 rand_xorshift = "0.2"
 rlp = "0.4.2"
--- a/ethcore/snapshot/snapshot-tests/src/proof_of_authority.rs
+++ b/ethcore/snapshot/snapshot-tests/src/proof_of_authority.rs
@ -30,7 +30,7 @@ use ethcore::{
 	miner::{self, MinerService},
 };
 use ethereum_types::Address;
-use ethkey::Secret;
+use parity_crypto::publickey::Secret;
 use keccak_hash::keccak;
 use lazy_static::lazy_static;
 use log::trace;
--- a/ethcore/src/client/client.rs
+++ b/ethcore/src/client/client.rs
@ -2785,7 +2785,7 @@ mod tests {
 	use blockchain::{ExtrasInsert, BlockProvider};
 	use client_traits::{BlockChainClient, ChainInfo};
-	use ethkey::KeyPair;
+	use parity_crypto::publickey::KeyPair;
 	use types::{
 		encoded,
 		engines::ForkChoice,
--- a/ethcore/src/lib.rs
+++ b/ethcore/src/lib.rs
@ -73,7 +73,7 @@ extern crate ethcore_stratum;
 extern crate ethash;
 #[cfg(any(test, feature = "test-helpers"))]
-extern crate ethkey;
+extern crate parity_crypto;
 #[cfg(any(test, feature = "test-helpers"))]
 extern crate ethjson;
 #[cfg(any(test, feature = "test-helpers"))]
--- a/ethcore/src/miner/miner.rs
+++ b/ethcore/src/miner/miner.rs
@ -1509,7 +1509,7 @@ mod tests {
 	use super::*;
 	use accounts::AccountProvider;
-	use ethkey::{Generator, Random};
+	use parity_crypto::publickey::{Generator, Random};
 	use hash::keccak;
 	use rustc_hex::FromHex;
--- a/ethcore/src/test_helpers/mod.rs
+++ b/ethcore/src/test_helpers/mod.rs
@ -36,7 +36,7 @@ use blockchain::{BlockChain, BlockChainDB, BlockChainDBHandler, Config as BlockC
 use blooms_db;
 use bytes::Bytes;
 use ethereum_types::{H256, U256, Address};
-use ethkey::KeyPair;
+use parity_crypto::publickey::KeyPair;
 use evm::Factory as EvmFactory;
 use hash::keccak;
 use io::IoChannel;
--- a/ethcore/src/test_helpers/test_client.rs
+++ b/ethcore/src/test_helpers/test_client.rs
@ -28,7 +28,7 @@ use bytes::Bytes;
 use db::{NUM_COLUMNS, COL_STATE};
 use ethcore_miner::pool::VerifiedTransaction;
 use ethereum_types::{H256, U256, Address};
-use ethkey::{Generator, Random};
+use parity_crypto::publickey::{Generator, Random};
 use ethtrie;
 use hash::keccak;
 use itertools::Itertools;
--- a/ethcore/src/tests/client.rs
+++ b/ethcore/src/tests/client.rs
@ -19,7 +19,7 @@ use std::sync::Arc;
 use account_state::state::StateInfo;
 use ethereum_types::{U256, Address};
-use ethkey::KeyPair;
+use parity_crypto::publickey::KeyPair;
 use hash::keccak;
 use io::IoChannel;
 use tempdir::TempDir;
--- a/ethcore/src/tests/trace.rs
+++ b/ethcore/src/tests/trace.rs
@ -16,7 +16,7 @@
 //! Client tests of tracing
-use ethkey::KeyPair;
+use parity_crypto::publickey::KeyPair;
 use hash::keccak;
 use block::*;
 use ethereum_types::{U256, Address};
--- a/ethcore/sync/Cargo.toml
+++ b/ethcore/sync/Cargo.toml
@ -17,7 +17,6 @@ enum_primitive = "0.1.1"
 ethcore-io = { path = "../../util/io" }
 ethcore-private-tx = { path = "../private-tx" }
 ethereum-types = "0.8.0"
 ethkey = { path = "../../accounts/ethkey" }
 fastmap = { path = "../../util/fastmap" }
 futures = "0.1"
 keccak-hash = "0.4.0"
@ -26,6 +25,7 @@ log = "0.4"
 macros = { path = "../../util/macros" }
 network = { package = "ethcore-network", path = "../../util/network" }
 parity-runtime = { path = "../../util/runtime" }
 parity-crypto = { version = "0.4.2", features = ["publickey"] }
 parity-util-mem = "0.2.0"
 rand = "0.7"
 parking_lot = "0.9"
--- a/ethcore/sync/src/api.rs
+++ b/ethcore/sync/src/api.rs
@ -39,7 +39,7 @@ use devp2p::NetworkService;
 use ethcore_io::TimerToken;
 use ethcore_private_tx::PrivateStateDB;
 use ethereum_types::{H256, H512, U256};
-use ethkey::Secret;
+use parity_crypto::publickey::Secret;
 use futures::sync::mpsc as futures_mpsc;
 use futures::Stream;
 use light::client::AsLightClient;
--- a/ethcore/sync/src/block_sync.rs
+++ b/ethcore/sync/src/block_sync.rs
@ -647,7 +647,7 @@ mod tests {
 	use crate::tests::{helpers::TestIo, snapshot::TestSnapshotService};
 	use ethcore::test_helpers::TestBlockChainClient;
-	use ethkey::{Random, Generator};
+	use parity_crypto::publickey::{Random, Generator};
 	use keccak_hash::keccak;
 	use parking_lot::RwLock;
 	use rlp::{encode_list, RlpStream};
--- a/ethcore/sync/src/chain/mod.rs
+++ b/ethcore/sync/src/chain/mod.rs
@ -1616,7 +1616,7 @@ pub mod tests {
 	#[test]
 	fn should_add_transactions_to_queue() {
 		fn sender(tx: &UnverifiedTransaction) -> Address {
-			ethkey::public_to_address(&tx.recover_public().unwrap())
+			parity_crypto::publickey::public_to_address(&tx.recover_public().unwrap())
 		}
 		// given
--- a/ethcore/sync/src/tests/consensus.rs
+++ b/ethcore/sync/src/tests/consensus.rs
@ -27,7 +27,7 @@ use ethcore::client::Client;
 use ethcore::miner::{self, MinerService};
 use ethcore_io::{IoHandler, IoChannel};
 use ethereum_types::{U256, Address};
-use ethkey::{KeyPair, Secret};
+use parity_crypto::publickey::{KeyPair, Secret};
 use keccak_hash::keccak;
 use common_types::{
 	io_message::ClientIoMessage,
--- a/ethcore/sync/src/tests/private.rs
+++ b/ethcore/sync/src/tests/private.rs
@ -37,7 +37,7 @@ use ethcore_io::{IoHandler, IoChannel};
 use ethcore_private_tx::{
 	Provider, ProviderConfig, NoopEncryptor, Importer, SignedPrivateTransaction, StoringKeyProvider
 };
-use ethkey::KeyPair;
+use parity_crypto::publickey::KeyPair;
 use keccak_hash::keccak;
 use machine::executive::contract_address;
 use rustc_hex::FromHex;
--- a/ethcore/types/Cargo.toml
+++ b/ethcore/types/Cargo.toml
@ -10,9 +10,9 @@ ethbloom = "0.8.0"
 ethcore-io = { path = "../../util/io" }
 ethereum-types = "0.8.0"
 ethjson = { path = "../../json" }
 ethkey = { path = "../../accounts/ethkey" }
 keccak-hash = "0.4.0"
 parity-bytes = "0.1"
 parity-crypto = { version = "0.4.2", features = ["publickey"] }
 parity-util-mem = "0.2.0"
 parity-snappy = "0.1"
 patricia-trie-ethereum = { path = "../../util/patricia-trie-ethereum" }
--- a/ethcore/types/src/errors/ethcore_error.rs
+++ b/ethcore/types/src/errors/ethcore_error.rs
@ -21,7 +21,7 @@ use derive_more::{Display, From};
 use ethereum_types::{U256, U512};
 use ethtrie::TrieError;
 use parity_snappy::InvalidInput;
-use ethkey::Error as EthkeyError;
+use parity_crypto::publickey::{Error as EthPublicKeyCryptoError};
 use errors::{BlockError, EngineError, ImportError, SnapshotError};
 use transaction::Error as TransactionError;
@ -64,7 +64,7 @@ pub enum EthcoreError {
 	Engine(EngineError),
 	/// Ethkey error."
 	#[display(fmt = "Ethkey error: {}", _0)]
-	Ethkey(EthkeyError),
+	Ethkey(EthPublicKeyCryptoError),
 	/// RLP decoding errors
 	#[display(fmt = "Decoder error: {}", _0)]
 	Decoder(rlp::DecoderError),
--- a/ethcore/types/src/lib.rs
+++ b/ethcore/types/src/lib.rs
@ -36,7 +36,7 @@
 extern crate ethbloom;
 extern crate ethereum_types;
 extern crate ethjson;
-extern crate ethkey;
+extern crate parity_crypto;
 #[macro_use]
 extern crate derive_more;
 extern crate keccak_hash as hash;
--- a/ethcore/types/src/transaction/error.rs
+++ b/ethcore/types/src/transaction/error.rs
@ -17,7 +17,7 @@
 use std::{fmt, error};
 use ethereum_types::U256;
-use ethkey;
+use parity_crypto::publickey::{Error as EthPublicKeyCryptoError};
 use rlp;
 use unexpected::OutOfBounds;
@ -88,8 +88,8 @@ pub enum Error {
 	InvalidRlp(String),
 }
-impl From<ethkey::Error> for Error {
+impl From<EthPublicKeyCryptoError> for Error {
-	fn from(err: ethkey::Error) -> Self {
+	fn from(err: EthPublicKeyCryptoError) -> Self {
 		Error::InvalidSignature(format!("{}", err))
 	}
 }
--- a/ethcore/types/src/transaction/transaction.rs
+++ b/ethcore/types/src/transaction/transaction.rs
@ -20,7 +20,7 @@ use std::ops::Deref;
 use ethereum_types::{H256, H160, Address, U256, BigEndianHash};
 use ethjson;
-use ethkey::{self, Signature, Secret, Public, recover, public_to_address};
+use parity_crypto::publickey::{Signature, Secret, Public, recover, public_to_address};
 use hash::keccak;
 use parity_util_mem::MallocSizeOf;
@ -193,7 +193,7 @@ impl Transaction {
 	/// Signs the transaction as coming from `sender`.
 	pub fn sign(self, secret: &Secret, chain_id: Option<u64>) -> SignedTransaction {
-		let sig = ::ethkey::sign(secret, &self.hash(chain_id))
+		let sig = parity_crypto::publickey::sign(secret, &self.hash(chain_id))
 			.expect("data is valid and context has signing capabilities; qed");
 		SignedTransaction::new(self.with_signature(sig, chain_id))
 			.expect("secret is valid so it's recoverable")
@ -367,9 +367,9 @@ impl UnverifiedTransaction {
 	}
 	/// Checks whether the signature has a low 's' value.
-	pub fn check_low_s(&self) -> Result<(), ethkey::Error> {
+	pub fn check_low_s(&self) -> Result<(), parity_crypto::publickey::Error> {
 		if !self.signature().is_low_s() {
-			Err(ethkey::Error::InvalidSignature.into())
+			Err(parity_crypto::publickey::Error::InvalidSignature.into())
 		} else {
 			Ok(())
 		}
@ -381,7 +381,7 @@ impl UnverifiedTransaction {
 	}
 	/// Recovers the public key of the sender.
-	pub fn recover_public(&self) -> Result<Public, ethkey::Error> {
+	pub fn recover_public(&self) -> Result<Public, parity_crypto::publickey::Error> {
 		Ok(recover(&self.signature(), &self.unsigned.hash(self.chain_id()))?)
 	}
@ -392,11 +392,11 @@ impl UnverifiedTransaction {
 		}
 		// Disallow unsigned transactions in case EIP-86 is disabled.
 		if !allow_empty_signature && self.is_unsigned() {
-			return Err(ethkey::Error::InvalidSignature.into());
+			return Err(parity_crypto::publickey::Error::InvalidSignature.into());
 		}
 		// EIP-86: Transactions of this form MUST have gasprice = 0, nonce = 0, value = 0, and do NOT increment the nonce of account 0.
 		if allow_empty_signature && self.is_unsigned() && !(self.gas_price.is_zero() && self.value.is_zero() && self.nonce.is_zero()) {
-			return Err(ethkey::Error::InvalidSignature.into())
+			return Err(parity_crypto::publickey::Error::InvalidSignature.into())
 		}
 		match (self.chain_id(), chain_id) {
 			(None, _) => {},
@ -407,7 +407,7 @@ impl UnverifiedTransaction {
 	}
 	/// Try to verify transaction and recover sender.
-	pub fn verify_unordered(self) -> Result<SignedTransaction, ethkey::Error> {
+	pub fn verify_unordered(self) -> Result<SignedTransaction, parity_crypto::publickey::Error> {
 		SignedTransaction::new(self)
 	}
 }
@ -439,7 +439,7 @@ impl From<SignedTransaction> for UnverifiedTransaction {
 impl SignedTransaction {
 	/// Try to verify transaction and recover sender.
-	pub fn new(transaction: UnverifiedTransaction) -> Result<Self, ethkey::Error> {
+	pub fn new(transaction: UnverifiedTransaction) -> Result<Self, parity_crypto::publickey::Error> {
 		if transaction.is_unsigned() {
 			Ok(SignedTransaction {
 				transaction: transaction,
@ -591,7 +591,7 @@ mod tests {
 	#[test]
 	fn signing_eip155_zero_chainid() {
-		use ethkey::{Random, Generator};
+		use parity_crypto::publickey::{Random, Generator};
 		let key = Random.generate().unwrap();
 		let t = Transaction {
@ -604,7 +604,7 @@ mod tests {
 		};
 		let hash = t.hash(Some(0));
-		let sig = ::ethkey::sign(&key.secret(), &hash).unwrap();
+		let sig = parity_crypto::publickey::sign(&key.secret(), &hash).unwrap();
 		let u = t.with_signature(sig, Some(0));
 		assert!(SignedTransaction::new(u).is_ok());
@ -612,7 +612,7 @@ mod tests {
 	#[test]
 	fn signing() {
-		use ethkey::{Random, Generator};
+		use parity_crypto::publickey::{Random, Generator};
 		let key = Random.generate().unwrap();
 		let t = Transaction {
@ -647,7 +647,7 @@ mod tests {
 	#[test]
 	fn should_recover_from_chain_specific_signing() {
-		use ethkey::{Random, Generator};
+		use parity_crypto::publickey::{Random, Generator};
 		let key = Random.generate().unwrap();
 		let t = Transaction {
 			action: Action::Create,
--- a/ethcore/verification/Cargo.toml
+++ b/ethcore/verification/Cargo.toml
@ -34,7 +34,7 @@ unexpected = { path = "../../util/unexpected" }
 [dev-dependencies]
 criterion = "0.3"
 ethcore = { path = "../", features = ["test-helpers"] }
-ethkey = { path = "../../accounts/ethkey" }
+parity-crypto = { version = "0.4.2", features = ["publickey"] }
 machine = { path = "../machine" }
 null-engine = { path = "../engines/null-engine" }
 spec = { path = "../spec" }
--- a/ethcore/verification/src/verification.rs
+++ b/ethcore/verification/src/verification.rs
@ -375,7 +375,7 @@ mod tests {
 	use parity_bytes::Bytes;
 	use keccak_hash::keccak;
 	use engine::Engine;
-	use ethkey::{Random, Generator};
+	use parity_crypto::publickey::{Random, Generator};
 	use spec;
 	use ethcore::test_helpers::{
 		create_test_block_with_data, create_test_block, TestBlockChainClient
@ -587,7 +587,7 @@ mod tests {
 		bad_header.set_transactions_root(eip86_transactions_root.clone());
 		bad_header.set_uncles_hash(good_uncles_hash.clone());
 		match basic_test(&create_test_block_with_data(&bad_header, &eip86_transactions, &good_uncles), engine) {
-			Err(Error::Transaction(ref e)) if e == &::ethkey::Error::InvalidSignature.into() => (),
+			Err(Error::Transaction(ref e)) if e == &parity_crypto::publickey::Error::InvalidSignature.into() => (),
 			e => panic!("Block verification failed.\nExpected: Transaction Error (Invalid Signature)\nGot: {:?}", e),
 		}
--- a/miner/Cargo.toml
+++ b/miner/Cargo.toml
@ -39,7 +39,7 @@ transaction-pool = "2.0.1"
 [dev-dependencies]
 env_logger = "0.5"
-ethkey = { path = "../accounts/ethkey" }
+parity-crypto = { version = "0.4.2", features = ["publickey"] }
 rustc-hex = "1.0"
 [features]
--- a/miner/local-store/Cargo.toml
+++ b/miner/local-store/Cargo.toml
@ -17,4 +17,5 @@ serde_json = "1.0"
 [dev-dependencies]
 ethkey = { path = "../../accounts/ethkey" }
 parity-crypto = { version = "0.4.2", features = ["publickey"] }
 kvdb-memorydb = "0.1.2"
--- a/miner/local-store/src/lib.rs
+++ b/miner/local-store/src/lib.rs
@ -201,7 +201,8 @@ mod tests {
 	use std::sync::Arc;
 	use common_types::transaction::{Transaction, Condition, PendingTransaction};
-	use ethkey::{Brain, Generator};
+	use ethkey::Brain;
 	use parity_crypto::publickey::Generator;
 	// we want to test: round-trip of good transactions.
 	// failure to roundtrip bad transactions (but that it doesn't panic)
--- a/miner/src/lib.rs
+++ b/miner/src/lib.rs
@ -50,7 +50,7 @@ extern crate trace_time;
 #[cfg(test)]
 extern crate rustc_hex;
 #[cfg(test)]
-extern crate ethkey;
+extern crate parity_crypto;
 #[cfg(test)]
 extern crate env_logger;
--- a/miner/src/pool/local_transactions.rs
+++ b/miner/src/pool/local_transactions.rs
@ -235,7 +235,7 @@ impl txpool::Listener<Transaction> for LocalTransactionsList {
 mod tests {
 	use super::*;
 	use ethereum_types::U256;
-	use ethkey::{Random, Generator};
+	use parity_crypto::publickey::{Random, Generator};
 	use types::transaction;
 	use txpool::Listener;
--- a/Show More
+++ b/Show More