ENHANCING ADVANCED ENCRYPTION STANDARD S-BOX GENERATION BASED ON ROUND KEY

In 1997, the National Institute of Standards and Technology send out a call for candidates to replace the aging and obsolete Data Encryption Standard (DES). NIST then announced the selection of Rijndael as the proposed Advanced Encryption Standard (AES) [1]. Rijndael, submitted by Joan Daemen and Vincent Rijmen is designed for the use with keys of lengths 128, 192, and 256 bits. Although AES uses the same three key size alternatives, it limits the block length to 128 bits [2].