In cryptography block ciphers (like AES) are designed to encrypt a block of data of fixed size (e.g. 128 bits). The size of the input block is usually the same as the size of the encrypted output ...

Abstract: To provide confidentiality and integrity guarantees based on block ciphers, the NIST approved a set of modes of operation for block ciphers, which are discussed in this chapter. They include ...

This repository implements basic implementations of AES128 and AES256 in C, Python. The core algorithm proceeds by performing S-box, shift, mix, and add_round methods. sub_bytes(state, sbox); ...

Abstract: Block ciphers such as AES are deterministic, keyed functions that operate on small, fixed-size blocks. Block-cipher modes of operation define a mechanism for probabilistic encryption of ...