diff --git a/core/src/main/java/io/github/mmm/crypto/symmetric/crypt/aes/SymmetricCryptorConfigAes.java b/core/src/main/java/io/github/mmm/crypto/symmetric/crypt/aes/SymmetricCryptorConfigAes.java
index 9f34c94..243766f 100644
--- a/core/src/main/java/io/github/mmm/crypto/symmetric/crypt/aes/SymmetricCryptorConfigAes.java
+++ b/core/src/main/java/io/github/mmm/crypto/symmetric/crypt/aes/SymmetricCryptorConfigAes.java
@@ -45,7 +45,7 @@ public SymmetricCryptorConfigAes(String mode, String padding, SecurityProvider p
    */
   public SymmetricCryptorConfigAes(SecurityProvider provider) {
 
-    this(provider, 16);
+    this(provider, 12);
   }
 
   /**