I have created an application that will be able to read any file and encrypt it using AES Encryption. For efficiency, I am reading a block of data, encrypting it and so on. So for decrypting, I just ...
The Rijndael S-Box design generates a permutation cycle of type $2+27+59+81+87$. What effect would replacing that permutation with a cycle of type $256$ have on the security of AES?
A few years ago I devised a symmetric-key system that worked like so: ...
I've read a lot of summaries of block ciphers particularly with regards to the NIST competitions stating that reduced-round block ciphers are, for example, vulnerable to differential cryptanalysis. I ...
AES has several different variants: AES-128 AES-192 AES-256 But why would someone prefer use one over another?
Why do we use a permutation table in the first step of DES algorithm and one at the end of algorithm?