迭代混沌映射的S盒构造方法  

A method for generating S-box based on iterating chaotic maps

作　　者：何波[1] 罗龙艳[1] 肖迪[2] 

机构地区：[1]重庆邮电大学电子商务与现代物流重点实验室,重庆400065 [2]重庆大学计算机学院,重庆400044

出　　处：《重庆邮电大学学报（自然科学版）》2010年第1期89-93,共5页Journal of Chongqing University of Posts and Telecommunications(Natural Science Edition)

基　　金：国家自然科学基金项目(60703035);重庆市科委自然科学基金项目(2008BB2193;2009BB2288)

摘　　要：置换盒又称为S盒,是分组密码中常采用的重要部件。首先对评价S盒性能的指标进行了分析,以非线性度、完全雪崩准则、输出比特间独立性、差分均匀性和双射作为主要的评价指标。然后利用混沌系统在相空间的高度非线性,提出了一种迭代混沌映射的S盒构造方法。仿真检测表明,利用该算法产生的S盒具有很好的密码学特性,为开发新的分组密码算法和动态S盒加密方法奠定了很好的基础。Substitution box （S-box） is an important component in the block cipher. Firstly, the performance indices of S-box were summarized. Five properties, such as nonlinearity, SAC, BIC, differential uniformity and bijection, were employed as the main indices to evaluate S-boxes. By using the characteristic that the distribution of chaotic obit in the phase space is nonlinear, a method for constructing S-box based on iterating chaotic maps was proposed. Simulation tests show that a set of S-boxes with high cryptographic properties can be obtained by using the proposed method, which is very helpful for design block cipher and eneryption algorithms with dynamic S-boxes.

关 键 词：S盒 混沌 密码学 信息安全 

分 类 号：TP301[自动化与计算机技术—计算机系统结构]