public byte MixTable()
    {
        // Re-calculate table fields
        this.i = ((this.i + 1) % 256);
        this.j = ((j + pSBox[i]) % 256);

        // Swap table fields
        int bSwap = pSBox[this.i];
        pSBox[this.i] = pSBox[this.j];
        pSBox[this.j] = bSwap;

        return (byte)pSBox[(pSBox[this.i] + pSBox[this.j]) % 256];
    }