How come the s boxes of DES are lossless? How can we get back the row and column values from the output of s boxes while decryption.
If you know S-DES, the each S-box takes 4 bits as input and gives out 2 bits as output so while decryption how the hell we get 4 bits from two bits. Please explain in detail or provide links
If you know S-DES, the each S-box takes 4 bits as input and gives out 2 bits as output so while decryption how the hell we get 4 bits from two bits. Please explain in detail or provide links
