随机分组密码算法框架及实现  

Random block cipher frame and implementation

作　　者：罗平[1] 宋涛[1] 

机构地区：[1]清华大学计算机科学与技术系网络所,北京100084

出　　处：《计算机应用研究》2008年第5期1556-1559,共4页Application Research of Computers

摘　　要：针对现有的对分组密码的攻击方法对于未知结构的密码算法是无效的特点,提出了一个根据已有分组密码算法生成随机密码算法的框架,其密码算法是由随机控制密钥生成的,因而算法是随机的,能抵抗针对固定结构的密码算法的线性密码分析和差分密码分析。同时还提出了一个具体的AES的随机化算法,该算法具有可证明的安全性,其安全性高于原始的AES,性能与原始的AES算法接近。Current attack method for block ciphers would loose efficiency when the structure of block cipher was unknown. This paper designed a framework of random structure block cipher. It based on known block ciphers, and could be generated by random control key. The framework resisted both differential attack and linear attack. In addition, this paper designed a random block cipher based on AES. It can be proved security, and is safer than original AES with little lost of performance.

关 键 词：分组密码算法 线性密码分析 差分密码分析 AES 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构]