基于混沌Lorenz系统的S盒设计  

An S-box Construction Algorithm Based on Chaotic Lorenz System

作　　者：谷晓辰[1] 丁文霞[1] 

机构地区：[1]国防科技大学电子科学与工程学院,长沙410073

出　　处：《重庆理工大学学报（自然科学）》2013年第3期97-103,共7页Journal of Chongqing University of Technology：Natural Science

基　　金："十二五"国防预研项目(0404040604)

摘　　要：S盒又称为置换盒,是许多分组密码算法中唯一的非线性部件,它的密码强度决定了整个密码算法的安全性。一个好的S盒对于安全系统来说是至关重要的,因此提出了一种基于混沌Lorenz系统的S盒设计方法,并对S盒的双射性、非线性度、严格雪崩准则、输出比特间独立性和差分均匀性进行了测试和分析。分析结果表明:利用该算法产生的S盒具有很好的密码学特性,适用于开发新的分组密码算法。S-box(substitution box) is the only nonlinear component in the block cipher.Cipher strength determines the entire security of the cryptographic.A good S-box is very important to safety system.A method for constructing S-box based on chaotic Lorenz system was proposed.Then the performance indices of S-box were summarized.Five properties,such as bijective property,nonlinearity,strict avalanche criterion,output bits independence criterion and equiprobable input/output XOR distribution,were tested and analyzed.Simulation tests show that a set of S-box with high cryptographic properties can be obtained by using the proposed method,which is very helpful for design block cipher.

关 键 词：S盒 混沌 密码学 

分 类 号：TN918.4[电子电信—通信与信息系统]