What is the method to replace AES s box?. Is it possible to generate all the S box ,permutation of 0 to 255 using GF 256 logic similar to AES
If DES decryption is the same as encryption done in reverse order, then how can the reversed S-Box convert 4 bits into 6 bits?
In DES, different S-boxes were tested for cryptanalytic resistance and the most secure one was chosen for the algorithm itself. How do different S-boxes offer different levels of security against ...
It seems like the S-boxes in DES have essentially random values. How were these chosen?