【摘 要】
：
It is well known that the algebraic expression of AES S-box is very simple and only 9 terms are involved.Hence, AES security is suspected although there is no v
【机 构】
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National Key Lab. of Integrated Service Networks,Information Science and Technology School of Sun Ya
论文部分内容阅读
It is well known that the algebraic expression of AES S-box is very simple and only 9 terms are involved.Hence, AES security is suspected although there is no vulnerability on it so far.To eliminate the weakness of extremely small terms in the algebraic expression of AES S-box, one improved AES S-box is proposed, which preserves the algebraic degree invariable but significantly increases the number of its algebraic expression terms from 9 to 255.At the same time, Boolean function has good characters in balance and strict avalanche criterion (SAC), etc.Finally, it is proved that the improved AES S-box scheme is secure against the powerful known differential and linear cryptanalysis.
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