摘要： S盒是分组密码的重要组成部分，在很大程度上决定了分组密码的安全性。该文研究了中国分组密码标准SMS4算法S盒的平衡性、差分性质、线性结构、非线性、Walsh谱等性质，通过与美国高级加密标准、欧洲分组加密标准Camellia的S盒作比较，说明了SMS4算法S盒一些较好的安全特性。

关键词: SMS4算法, 高级加密标准, S盒, 布尔函数

Abstract: S-boxes are quite important components of modern symmetric cryptosystems in the sense that S-boxes bring nonlinearity to block ciphers and strengthen their cryptographic security. This paper analyzes the cryptographic properties of the SMS4 S-box. Some algebraic properties of S-boxes such as Balanceness, differential characteristics, linear structures, nonlinearity and Walsh spectrums are investigated. It claims that SMS4 S-box possesses some better properties by being compared with those S-boxes used in AES and Camellia.

Key words: SMS4 algorithm, AES, S-box, Boolean function

中图分类号: 

• TP301.6