this.transformation = transformation;
        this.algorithm = algorithm;
        this.initVectorLength = initVectorLength;
    }
    private AlgorithmParameterSpec getDecryptionParameter(IVLoader ivLoader) throws IOException {
        assert initVectorLength > 0;
        byte[] initVector = new byte[initVectorLength];
        ivLoader.load(initVector);
        return createParameter(initVector);
    }