Abstract:

For improving the security of Rijndael algorithm in the process of key generation, a character called non-deduction was summarized. With this character, the Rijndael key schedule was improved. We made use of continuous two round keys to generate the next round keys, which made the Rijndael key schedule also possess the character nondeduction. Therefore the security of the original key generation algorithm was enhanced.

Key words: non-deduction, Rijndael key generation algorithm, Serpent key generation algorithm, security