diff --git a/src/main/java/com/luminiasoft/bitshares/FileBin.java b/src/main/java/com/luminiasoft/bitshares/FileBin.java
index 37306f2..9e29bdb 100644
--- a/src/main/java/com/luminiasoft/bitshares/FileBin.java
+++ b/src/main/java/com/luminiasoft/bitshares/FileBin.java
@@ -54,8 +54,10 @@ public abstract class FileBin {
 
             ECKey randomECKey = ECKey.fromPublicOnly(publicKey);
             byte[] finalKey = randomECKey.getPubKeyPoint().multiply(ECKey.fromPrivate(md.digest(password.getBytes("UTF-8"))).getPrivKey()).normalize().getXCoord().getEncoded();
-
+            MessageDigest md1 = MessageDigest.getInstance("SHA-512");
+            finalKey = md1.digest(finalKey);
             rawData = decryptAES(rawData, byteToString(finalKey).getBytes());
+            
             byte[] checksum = new byte[4];
             System.arraycopy(rawData, 0, checksum, 0, 4);
             byte[] compressedData = new byte[rawData.length-4];
diff --git a/src/main/java/com/luminiasoft/bitshares/Test.java b/src/main/java/com/luminiasoft/bitshares/Test.java
index 02a25de..f010b9e 100644
--- a/src/main/java/com/luminiasoft/bitshares/Test.java
+++ b/src/main/java/com/luminiasoft/bitshares/Test.java
@@ -731,6 +731,6 @@ public class Test {
 
     public void testCreateBinFile(){
         byte[] fileOutput = FileBin.getBytesFromBrainKey(Main.BRAIN_KEY, "123456","bithon-83");
-        System.out.println("fileOutput " + Arrays.toString(fileOutput));
+        System.out.println(FileBin.getBrainkeyFromByte(fileOutput, "123456"));
     }
 }