int count = length / 8;

        for (int i=0; i<count; i++)
            encrypt(cipherText, i*8, clearText, i*8);

        return clearText;
    }


    // Tables, permutations, S-boxes, etc.

    private static byte[] bytebit = {
        (byte)0x80, (byte)0x40, (byte)0x20, (byte)0x10,
        (byte)0x08, (byte)0x04, (byte)0x02, (byte)0x01
    };