Arrays.fill(plaintext, '\0');
        Arrays.fill(decrypted, '\0');
    }

    @Test
    public void testDifferentEncryptionsProduceDifferentCiphertexts() throws Exception {
        char[] plaintext = "SamePassword".toCharArray();

        // Encrypt twice
        byte[] encrypted1 = storage.encryptCredentials(plaintext.clone());
        byte[] encrypted2 = storage.encryptCredentials(plaintext.clone());