摘要
由于混沌系统对初始条件和混沌参数非常敏感以及生成的混沌序列具有非周期性和伪随机性的特性,近年来在信息加密领域得到了较多的应用。但是大多数混沌序列发生器都是采用单混沌系统,可能存在一些潜在的动力学系统攻击方法。提出了一种基于两个参数随机变换的混沌系统的伪随机序列发生器,生成一个随机性好、长周期的密钥序列,并给出了统计特性分析的严格的理论证明。理论分析表明此密钥序列具有较高的线性复杂度和良好的密码学特性。
Chaos is widely used in information encryption because of its high sensitive to initial conditions and parameters and its stochastic series. This paper points out some existent problems in digital chaotic ciphers. A novel pseudo-random bit gene-rator based on a couple of chaotic system is presented. A chaos key stream with good randomcity and long period is made out, and its statistic character is proved strictly. It is proved that series has high complexity and good cipher quality.
出处
《计算机应用研究》
CSCD
北大核心
2005年第8期97-98,142,共3页
Application Research of Computers
基金
国家自然科学基金重点项目(69931040)
