public void test_multipleProviders() {
        // Test that multiple providers can coexist independently
        InvertibleCryptographer inver1 = InvertibleCryptographer.createAesCipher("key1key1key1key1");
        InvertibleCryptographer inver2 = InvertibleCryptographer.createAesCipher("key2key2key2key2");
        OneWayCryptographer oneWay1 = OneWayCryptographer.createSha256Cryptographer();