diff --git a/app/js/lib/bin_utils.js b/app/js/lib/bin_utils.js
index 2d7e0b9a..69344b13 100644
--- a/app/js/lib/bin_utils.js
+++ b/app/js/lib/bin_utils.js
@@ -156,16 +156,6 @@ function bytesToArrayBuffer (b) {
   return (new Uint8Array(b)).buffer;
 }
 
-function bufferConcat(buffer1, buffer2) {
-  var l1 = buffer1.byteLength || buffer1.length,
-      l2 = buffer2.byteLength || buffer2.length;
-  var tmp = new Uint8Array(l1 + l2);
-  tmp.set(buffer1 instanceof ArrayBuffer ? new Uint8Array(buffer1) : buffer1, 0);
-  tmp.set(buffer2 instanceof ArrayBuffer ? new Uint8Array(buffer2) : buffer2, l1);
-
-  return tmp.buffer;
-}
-
 function bytesFromArrayBuffer (buffer) {
   var len = buffer.byteLength,
       byteView = new Uint8Array(buffer),
@@ -178,6 +168,16 @@ function bytesFromArrayBuffer (buffer) {
   return bytes;
 }
 
+function bufferConcat(buffer1, buffer2) {
+  var l1 = buffer1.byteLength || buffer1.length,
+      l2 = buffer2.byteLength || buffer2.length;
+  var tmp = new Uint8Array(l1 + l2);
+  tmp.set(buffer1 instanceof ArrayBuffer ? new Uint8Array(buffer1) : buffer1, 0);
+  tmp.set(buffer2 instanceof ArrayBuffer ? new Uint8Array(buffer2) : buffer2, l1);
+
+  return tmp.buffer;
+}
+
 function longToInts (sLong) {
   var divRem = bigStringInt(sLong).divideAndRemainder(bigint(0x100000000));
 
diff --git a/app/js/lib/ng_utils.js b/app/js/lib/ng_utils.js
index 82a98c61..f6fdfd29 100644
--- a/app/js/lib/ng_utils.js
+++ b/app/js/lib/ng_utils.js
@@ -486,7 +486,9 @@ angular.module('izhukov.utils', [])
 
   var worker = window.Worker && new Worker('js/lib/crypto_worker.js') || false,
       taskID = 0,
-      awaiting = {};
+      awaiting = {},
+      webCrypto = window.crypto && (window.crypto.subtle || window.crypto.webkitSubtle) || window.msCrypto && window.msCrypto.subtle,
+      useSha1Crypto = webCrypto && webCrypto.digest !== undefined;
 
   if (worker) {
     worker.onmessage = function (e) {
@@ -521,6 +523,22 @@ angular.module('izhukov.utils', [])
 
   return {
     sha1Hash: function (bytes) {
+      if (useSha1Crypto) {
+        var deferred = $q.defer(),
+            buffer = bytes instanceof ArrayBuffer
+              ? bytes
+              : bytesToArrayBuffer(bytes);
+
+        webCrypto.digest({name: 'SHA-1'}, buffer).then(function (digest) {
+          deferred.resolve(bytesFromArrayBuffer(digest));
+        }, function  (e) {
+          console.error('Crypto digest error', e);
+          useSha1Crypto = false;
+          deferred.resolve(sha1Hash(bytes));
+        });
+
+        return deferred.promise;
+      }
       if (worker && false) { // due overhead for data transfer
         return performTaskWorker ('sha1-hash', {bytes: bytes});
       }