diff --git a/tests/KeyGenTest.cs b/tests/KeyGenTest.cs
index 85b9a85..f3ededf 100644
--- a/tests/KeyGenTest.cs
+++ b/tests/KeyGenTest.cs
@@ -14,8 +14,11 @@ namespace tests
         [Test]
         public void TestKeyGen()
         {
-            System.Console.Write(chestcrypto.PrivateKeyGenerator.generate().Length);
-            if (chestcrypto.PrivateKeyGenerator.generate().Length != 96){
+            byte[] key = chestcrypto.PrivateKeyGenerator.generate();
+            if (key.Length != 96){
+                Assert.Fail();
+            }
+            if (key.Equals(chestcrypto.PrivateKeyGenerator.generate())){
                 Assert.Fail();
             }
             Assert.Pass();
diff --git a/treasurechest/chestcrypto/keygen.cs b/treasurechest/chestcrypto/keygen.cs
index 4b5d3de..ff853b0 100644
--- a/treasurechest/chestcrypto/keygen.cs
+++ b/treasurechest/chestcrypto/keygen.cs
@@ -28,10 +28,13 @@ namespace chestcrypto{
             Buffer.BlockCopy(second, 0, bytes, first.Length, second.Length);
             return bytes;
         }
-        public static byte[] generate(){
+        public static byte[] generate()
+        {
             byte[] ed25519 = Ed25519KeyGenerator.generator();
             byte[] curve25519 = Curve25519KeyGenerator.generator();
             byte[] key = Combine(ed25519, curve25519);
+            Array.Clear(ed25519, 0, ed25519.Length);
+            Array.Clear(curve25519, 0, curve25519.Length);
             return key;
 
         }