文章基本信息

标题：New Directions in Cryptanalysis of Block Ciphers
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作者：RezaeiPour, Davood ; Said, Mohamad Rushdan Md
期刊名称：Journal of Computer Science
印刷版ISSN：1549-3636
出版年度：2009
卷号：5
期号：12
页码：1091-1094
DOI：10.3844/jcssp.2009.1091.1094
出版社：Science Publications
摘要：Problem statement: The algebraic expression of the Advanced Encryption Standard (AES) RIJNDAEL S-box involved only 9 terms. The selected mapping for RIJNDAEL S-box has a simple algebraic expression. This enables algebraic manipulations which can be used to mount interpolation attack. Approach: The interpolation attack was introduced as a cryptanalytic attack against block ciphers. This attack is useful for cryptanalysis using simple algebraic functions as S-boxes. Results: In this study, we presented an improved AES S-box with good properties to improve the complexity of AES S-box algebraic expression with terms increasing to 255. Conclusion: The improved S-box is resistant against interpolation attack. We can develop the derivatives of interpolation attack using the estimations of S-box with less nonlinearity.
关键词：Block cipher; AES; S-box; interpolation attack; Lagrange interpolation formula