In 2000, NIST announced the selection of the Rijndael block cipher family as the winner of the Advanced Encryption Standard (AES) competition. Block ciphers are the foundation for many cryptographic …

AES, notified by NIST as a standard in 2001, is a slight variation of the Rijndael cipher invented by two Belgian cryptographers Joan Daemen and Vincent Rijmen.

AES and DES are both substitution-permutation ciphers. Both work in Rounds. DES has sixteen Rounds whereas AES has 10 Rounds for a 128-bit key, 12 Rounds for a 192-bit key, and 14 Rounds for a …

Summary AES encrypts 128 bit blocks with 128-bit, 192-bit or 256-bit keys using 10, 12, or 14 rounds, respectively. Is not a Feistel cipher ⇒ All 128 bits are encrypted Each round = 4 steps of SubBytes, …

In fact, the structure of S-AES is exactly the same as AES. The differences are in the key size (16 bits), the block size (16 bits) and the number of rounds (2 rounds).

Rationale: Simple as possible and affecting every bit The complexity of the round key expansion plus the complexity of the other stages of AES ensure security AES

Considered one of the most secure encryption standards in use today, it has been adopted by the United States government and other countries around the world to protect confidential data and …