diff --git a/src/main/java/org/owasp/benchmark/testcode/Benchmark00684.java b/src/main/java/org/owasp/benchmark/testcode/Benchmark00684.java
index 68d69bc..58fa166 100644
--- a/src/main/java/org/owasp/benchmark/testcode/Benchmark00684.java
+++ b/src/main/java/org/owasp/benchmark/testcode/Benchmark00684.java
@@ -55,15 +55,15 @@ public void doPost(HttpServletRequest request, HttpServletResponse response)
         //	    	(byte)0x44, (byte)0x21, (byte)0xC3, (byte)0xC3033
         //	    };
         java.security.SecureRandom random = new java.security.SecureRandom();
-        byte[] iv = random.generateSeed(8); // DES requires 8 byte keys
+        byte[] iv = random.generateSeed(16); // AES uses a 16-byte (128-bit) block size
 
         try {
             javax.crypto.Cipher c =
                     javax.crypto.Cipher.getInstance(
-                            "DES/CBC/PKCS5PADDING", java.security.Security.getProvider("SunJCE"));
+                            "AES/CBC/PKCS5PADDING", java.security.Security.getProvider("SunJCE"));
 
             // Prepare the cipher to encrypt
-            javax.crypto.SecretKey key = javax.crypto.KeyGenerator.getInstance("DES").generateKey();
+            javax.crypto.SecretKey key = javax.crypto.KeyGenerator.getInstance("AES").generateKey();
             java.security.spec.AlgorithmParameterSpec paramSpec =
                     new javax.crypto.spec.IvParameterSpec(iv);
             c.init(javax.crypto.Cipher.ENCRYPT_MODE, key, paramSpec);