AES的结构及其S-box分析

Analysis of Structure of AES and its S-box

分析了 AES的加解密原理和密钥生成器的结构 ,S- box的分布特性。指出了 AES与其密钥生成器之间存在一种结构上的同步性 ,这种同步性可能成为 AES的弱点 ;AES的 S- box具有短周期 ,不具有良好的分布特性。这给 AES的密码分析提供了可能 ,也许会成为 AES的致命弱点。

This paper analyzes the principle of encryption and decryption of AES,the structure of the key generator,and the distribution property of S box, which shows that there exists a synchronization, a protential weakness of AES, between AES and its key generator in structure, and that the S box has short periods, and bad distribution, which may leave some lacuna for AES.