diff --git a/package.json b/package.json
index 50ffcde..cd740d7 100644
--- a/package.json
+++ b/package.json
@@ -37,9 +37,9 @@
     "plugins": []
   },
   "dependencies": {
+    "bcrypto": "^4.2.3",
     "bn.js": "^5.0.0",
     "buffer": "^5.4.3",
-    "libp2p-crypto": "^0.17.1",
-    "sodium-native": "^2.4.6"
+    "libp2p-crypto": "^0.17.1"
   }
 }
diff --git a/src/xx.ts b/src/xx.ts
index 05cd45c..17646c8 100644
--- a/src/xx.ts
+++ b/src/xx.ts
@@ -1,7 +1,7 @@
 import {bytes32, bytes16, uint32, uint64, bytes} from './types/basic'
 import { Buffer } from 'buffer';
 import * as crypto from 'libp2p-crypto';
-import * as sodium from 'sodium-native';
+import AEAD from 'bcrypto/aead-browser';
 
 type KeyPair = {
   publicKey: bytes32,
@@ -41,7 +41,7 @@ const emptyKey = Buffer.alloc(32) as bytes32;
 const minNonce = 0;
 
 class XXHandshake {
-  async initializeInitiator(prologue: bytes32, s: KeyPair, rs: bytes32, psk: bytes32) : Promise<HandshakeState> {
+  private async initializeInitiator(prologue: bytes32, s: KeyPair, rs: bytes32, psk: bytes32) : Promise<HandshakeState> {
     const e: KeyPair;
     const re: bytes32;
     const name = "Noise_XX_25519_ChaChaPoly_SHA256";
@@ -66,13 +66,14 @@ class XXHandshake {
   }
 
   encrypt(k: bytes32, n: uint32, ad: bytes, plaintext: bytes) : bytes {
-    const ElongatedNonce = sodium.sodium_malloc(sodium.crypto_aead_xchacha20poly1305_ietf_NPUBBYTES); // 12U ?
-    sodium.sodium_memzero(ElongatedNonce);
-    ElongatedNonce.set(n, 16);
+    const nonce = Buffer.alloc(12);
+    nonce.writeUInt32LE(n, 4);
+    const ctx = new AEAD();
+    ctx.init(k, nonce);
+    ctx.aad(ad);
+    ctx.encrypt(plaintext);
 
-    const clen = plaintext.length + sodium.crypto_aead_xchacha20poly1305_ietf_ABYTES;
-    const c = sodium.sodium_malloc(clen);
-    sodium.crypto_aead_xchacha20poly1305_ietf_encrypt(c, plaintext, ad, null, ElongatedNonce, k);
+    return ctx.final();
   }
 
   // Cipher state related
diff --git a/yarn.lock b/yarn.lock
index 1fcce3b..06bd243 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -950,6 +950,16 @@ base@^0.11.1:
     mixin-deep "^1.2.0"
     pascalcase "^0.1.1"
 
+bcrypto@^4.2.3:
+  version "4.2.3"
+  resolved "https://registry.yarnpkg.com/bcrypto/-/bcrypto-4.2.3.tgz#cb2cf5647168e39b2f57de1c0c2ae49bcaf6ae00"
+  integrity sha512-58Dh2LNHaNHJo/IKEEhYbqE59dl5C0p5xwR8qOI4ixmAO3rp35u0NTYyLUPuEf/CFqMLK/eusMWQeC4vY7l7uA==
+  dependencies:
+    bsert "~0.0.10"
+    bufio "~1.0.6"
+    loady "~0.0.1"
+    nan "^2.13.2"
+
 binary-extensions@^1.0.0:
   version "1.13.1"
   resolved "https://registry.yarnpkg.com/binary-extensions/-/binary-extensions-1.13.1.tgz#598afe54755b2868a5330d2aff9d4ebb53209b65"
@@ -1053,6 +1063,11 @@ bs58@^4.0.1:
   dependencies:
     base-x "^3.0.2"
 
+bsert@~0.0.10:
+  version "0.0.10"
+  resolved "https://registry.yarnpkg.com/bsert/-/bsert-0.0.10.tgz#231ac82873a1418c6ade301ab5cd9ae385895597"
+  integrity sha512-NHNwlac+WPy4t2LoNh8pXk8uaIGH3NSaIUbTTRXGpE2WEbq0te/tDykYHkFK57YKLPjv/aGHmbqvnGeVWDz57Q==
+
 buffer-from@^1.0.0:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/buffer-from/-/buffer-from-1.1.1.tgz#32713bc028f75c02fdb710d7c7bcec1f2c6070ef"
@@ -1071,6 +1086,11 @@ buffer@^5.2.1, buffer@^5.4.3:
     base64-js "^1.0.2"
     ieee754 "^1.1.4"
 
+bufio@~1.0.6:
+  version "1.0.6"
+  resolved "https://registry.yarnpkg.com/bufio/-/bufio-1.0.6.tgz#e0eb6d70b2efcc997b6f8872173540967f90fa4d"
+  integrity sha512-mjYZFRHmI9bk3Oeexu0rWjHFY+w6hGLabdmwSFzq+EFr4MHHsNOYduDVdYl71NG5pTPL7GGzUCMk9cYuV34/Qw==
+
 cache-base@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/cache-base/-/cache-base-1.0.1.tgz#0a7f46416831c8b662ee36fe4e7c59d76f666ab2"
@@ -1984,7 +2004,7 @@ inherits@2, inherits@^2.0.1, inherits@^2.0.3, inherits@~2.0.3:
   resolved "https://registry.yarnpkg.com/inherits/-/inherits-2.0.4.tgz#0fa2c64f932917c3433a0ded55363aae37416b7c"
   integrity sha512-k/vGaX4/Yla3WzyMCvTQOXYeIHvqOKtnqBduzTHpzpQZzAskKMhZ2K+EnBiSM9zGSoIFeMpXKxa4dYeZIQqewQ==
 
-ini@^1.3.5, ini@~1.3.0:
+ini@~1.3.0:
   version "1.3.5"
   resolved "https://registry.yarnpkg.com/ini/-/ini-1.3.5.tgz#eee25f56db1c9ec6085e0c22778083f596abf927"
   integrity sha512-RZY5huIKCMRWDUqZlEi72f/lmXKMvuszcMBduliQ3nnWbx9X/ZBQO7DijMEYS9EhHBb2qacRUMtC7svLwe0lcw==
@@ -2334,6 +2354,11 @@ libp2p-crypto@^0.17.1:
     tweetnacl "^1.0.1"
     ursa-optional "~0.10.1"
 
+loady@~0.0.1:
+  version "0.0.1"
+  resolved "https://registry.yarnpkg.com/loady/-/loady-0.0.1.tgz#24a99c14cfed9cd0bffed365b1836035303f7e5d"
+  integrity sha512-PW5Z13Jd0v6ZcA1P6ZVUc3EV8BJwQuAiwUvvT6VQGHoaZ1d/tu7r1QZctuKfQqwy9SFBWeAGfcIdLxhp7ZW3Rw==
+
 locate-path@^3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/locate-path/-/locate-path-3.0.0.tgz#dbec3b3ab759758071b58fe59fc41871af21400e"
@@ -2562,7 +2587,7 @@ mute-stream@0.0.8:
   resolved "https://registry.yarnpkg.com/mute-stream/-/mute-stream-0.0.8.tgz#1630c42b2251ff81e2a283de96a5497ea92e5e0d"
   integrity sha512-nnbWWOkoWyUsTjKrhgD0dcz22mdkSnpYqbEjIm2nhwhuxlSkpywJmBo8h0ZqJdkp73mb90SssHkN4rsRaBAfAA==
 
-nan@^2.12.1, nan@^2.14.0:
+nan@^2.12.1, nan@^2.13.2, nan@^2.14.0:
   version "2.14.0"
   resolved "https://registry.yarnpkg.com/nan/-/nan-2.14.0.tgz#7818f722027b2459a86f0295d434d1fc2336c52c"
   integrity sha512-INOFj37C7k3AfaNTtX8RhsTw7qRy7eLET14cROi9+5HAVbbHuIWUHEauBv5qT4Av2tWasiTY1Jw6puUNqRJXQg==
@@ -2616,11 +2641,6 @@ node-forge@~0.9.1:
   resolved "https://registry.yarnpkg.com/node-forge/-/node-forge-0.9.1.tgz#775368e6846558ab6676858a4d8c6e8d16c677b5"
   integrity sha512-G6RlQt5Sb4GMBzXvhfkeFmbqR6MzhtnT7VTHuLadjkii3rdYHNdw0m8zA4BTxVIh68FicCQ2NSUANpsqkr9jvQ==
 
-node-gyp-build@^4.1.0:
-  version "4.1.1"
-  resolved "https://registry.yarnpkg.com/node-gyp-build/-/node-gyp-build-4.1.1.tgz#d7270b5d86717068d114cc57fff352f96d745feb"
-  integrity sha512-dSq1xmcPDKPZ2EED2S6zw/b9NKsqzXRE6dVr8TVQnI3FJOTteUMuqF3Qqs6LZg+mLGYJWqQzMbIjMtJqTv87nQ==
-
 node-modules-regexp@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/node-modules-regexp/-/node-modules-regexp-1.0.0.tgz#8d9dbe28964a4ac5712e9131642107c71e90ec40"
@@ -3310,15 +3330,6 @@ snapdragon@^0.8.1:
     source-map-resolve "^0.5.0"
     use "^3.1.0"
 
-sodium-native@^2.4.6:
-  version "2.4.6"
-  resolved "https://registry.yarnpkg.com/sodium-native/-/sodium-native-2.4.6.tgz#8a8173095e8cf4f997de393a2ba106c34870cac2"
-  integrity sha512-Ro9lhTjot8M01nwKLXiqLSmjR7B8o+Wg4HmJUjEShw/q6XPlNMzjPkA1VJKaMH8SO8fJ/sggAKVwreTaFszS2Q==
-  dependencies:
-    ini "^1.3.5"
-    nan "^2.14.0"
-    node-gyp-build "^4.1.0"
-
 source-map-resolve@^0.5.0:
   version "0.5.2"
   resolved "https://registry.yarnpkg.com/source-map-resolve/-/source-map-resolve-0.5.2.tgz#72e2cc34095543e43b2c62b2c4c10d4a9054f259"