diff --git a/Design:-Encryption-of-credentials.md b/Design:-Encryption-of-credentials.md
index 673101a..f745702 100644
--- a/Design:-Encryption-of-credentials.md
+++ b/Design:-Encryption-of-credentials.md
@@ -38,7 +38,21 @@ After encryption, it looks like this:
 By keeping it a valid JSON object underlying storage implementations should not be affected by the change.
         
 
+---
 
+### Encryption scheme
 
+   var encryptionKey = crypto.createHash('sha256').update(userKey).digest();
+   var initVector = crypto.randomBytes(16);
+   var cipher = crypto.createCipheriv("aes-256-ctr", encryptionKey, initVector);
+   var result = cipher.update(JSON.stringify(credentials), 'utf8', 'base64') + cipher.final('base64');
+   result = initVector.toString('hex') + result;
 
+### Decryption scheme
 
+    var encryptionKey = crypto.createHash('sha256').update(userKey).digest();
+    var initVector = new Buffer(encryptedCredentials.substring(0, 32),'hex');
+    encryptedCredentials = encryptedCredentials.substring(32);
+    var decipher = crypto.createDecipheriv(encryptionAlgorithm, encryptionKey, initVector);
+    var decrypted = decipher.update(encryptedCredentials, 'base64', 'utf8') + decipher.final('utf8');
+    var result = JSON.parse(decrypted);