diff --git a/Cargo.lock b/Cargo.lock
index 7128838e1a20f4a6cd7a80603c62b8723108a0f1..f6564d9d7875f615bd28888f588d4604cdd59276 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -24,7 +24,7 @@ name = "base64"
 version = "0.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "byteorder 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder 1.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "safemem 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -33,8 +33,8 @@ name = "bincode"
 version = "0.9.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "byteorder 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.27 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder 1.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.37 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -44,7 +44,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "byteorder"
-version = "1.2.1"
+version = "1.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -57,19 +57,19 @@ name = "crossbeam-deque"
 version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "crossbeam-epoch 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "crossbeam-epoch 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "crossbeam-utils 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "crossbeam-epoch"
-version = "0.3.0"
+version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "arrayvec 0.4.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "cfg-if 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "crossbeam-utils 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "memoffset 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "nodrop 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
  "scopeguard 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -85,7 +85,7 @@ dependencies = [
 
 [[package]]
 name = "duniter-crypto"
-version = "0.1.1"
+version = "0.1.2"
 dependencies = [
  "base58 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "base64 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -98,10 +98,10 @@ version = "0.7.0"
 dependencies = [
  "base58 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "base64 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "duniter-crypto 0.1.1",
+ "duniter-crypto 0.1.2",
  "lazy_static 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "linked-hash-map 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "regex 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "regex 0.2.10 (registry+https://github.com/rust-lang/crates.io-index)",
  "rust-crypto 0.2.36 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -110,15 +110,15 @@ name = "duniter-wotb"
 version = "0.7.1"
 dependencies = [
  "bincode 0.9.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "byteorder 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "rayon 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.27 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_derive 1.0.27 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder 1.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rayon 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.37 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_derive 1.0.37 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "either"
-version = "1.4.0"
+version = "1.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -140,11 +140,6 @@ name = "gcc"
 version = "0.3.54"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
-[[package]]
-name = "lazy_static"
-version = "0.2.11"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
 [[package]]
 name = "lazy_static"
 version = "1.0.0"
@@ -152,7 +147,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "libc"
-version = "0.2.37"
+version = "0.2.40"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -165,7 +160,7 @@ name = "memchr"
 version = "2.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.37 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.40 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -183,13 +178,24 @@ name = "num_cpus"
 version = "1.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.37 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.40 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "proc-macro2"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "quote"
-version = "0.3.15"
+version = "0.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "proc-macro2 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
 
 [[package]]
 name = "rand"
@@ -197,7 +203,7 @@ version = "0.3.22"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "fuchsia-zircon 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.37 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.40 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -207,16 +213,16 @@ version = "0.4.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "fuchsia-zircon 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.37 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.40 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "rayon"
-version = "1.0.0"
+version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "either 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "either 1.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "rayon-core 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -227,7 +233,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "crossbeam-deque 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.37 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.40 (registry+https://github.com/rust-lang/crates.io-index)",
  "num_cpus 1.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -239,20 +245,23 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "regex"
-version = "0.2.6"
+version = "0.2.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "aho-corasick 0.6.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "memchr 2.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "regex-syntax 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "regex-syntax 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "thread_local 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "utf8-ranges 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "regex-syntax"
-version = "0.4.2"
+version = "0.5.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "ucd-util 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
 
 [[package]]
 name = "rust-crypto"
@@ -260,7 +269,7 @@ version = "0.2.36"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "gcc 0.3.54 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.37 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.40 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand 0.3.22 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc-serialize 0.3.24 (registry+https://github.com/rust-lang/crates.io-index)",
  "time 0.1.39 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -283,44 +292,37 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "serde"
-version = "1.0.27"
+version = "1.0.37"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "serde_derive"
-version = "1.0.27"
+version = "1.0.37"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "quote 0.3.15 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_derive_internals 0.19.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 0.11.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_derive_internals 0.23.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 0.13.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "serde_derive_internals"
-version = "0.19.0"
+version = "0.23.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "syn 0.11.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "synom 0.11.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 0.13.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "syn"
-version = "0.11.11"
+version = "0.13.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "quote 0.3.15 (registry+https://github.com/rust-lang/crates.io-index)",
- "synom 0.11.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "unicode-xid 0.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "synom"
-version = "0.11.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "unicode-xid 0.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -337,14 +339,19 @@ name = "time"
 version = "0.1.39"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.37 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.40 (registry+https://github.com/rust-lang/crates.io-index)",
  "redox_syscall 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "ucd-util"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "unicode-xid"
-version = "0.0.4"
+version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -391,43 +398,43 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
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 "checksum bitflags 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "b3c30d3802dfb7281680d6285f2ccdaa8c2d8fee41f93805dba5c4cf50dc23cf"
-"checksum byteorder 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "652805b7e73fada9d85e9a6682a4abd490cb52d96aeecc12e33a0de34dfd0d23"
+"checksum byteorder 1.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "73b5bdfe7ee3ad0b99c9801d58807a9dbc9e09196365b0203853b99889ab3c87"
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-"checksum crossbeam-epoch 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "59796cc6cbbdc6bb319161349db0c3250ec73ec7fcb763a51065ec4e2e158552"
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diff --git a/crypto/Cargo.toml b/crypto/Cargo.toml
index a61f71e49ad8a2edca35a052ade4acb3bd357a95..eb02b40032768fac856cc3ecc744fe9f4e223be6 100644
--- a/crypto/Cargo.toml
+++ b/crypto/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "duniter-crypto"
-version = "0.1.1"
+version = "0.1.2"
 authors = ["nanocryk <nanocryk@duniter.org>"]
 description = "Manage cryptographic building blocks for the Duniter project."
 repository = "https://git.duniter.org/nodes/rust/duniter-rs"
diff --git a/crypto/keys/mod.rs b/crypto/keys/mod.rs
index d7cf2769f4a49761643b756259f4d0b0e7bb44f5..0717a469d1059f6758ff9b92da40c932cbb5d0c9 100644
--- a/crypto/keys/mod.rs
+++ b/crypto/keys/mod.rs
@@ -75,7 +75,7 @@ pub enum BaseConvertionError {
 ///
 /// [`PrivateKey`]: trait.PrivateKey.html
 /// [`PublicKey`]: trait.PublicKey.html
-pub trait Signature: Clone + Display + Debug + PartialEq + Eq {
+pub trait Signature: Clone + Display + Debug + PartialEq + Eq  + Hash {
     /// Create a `Signature` from a Base64 string.
     ///
     /// The Base64 string should contains only valid Base64 characters