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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 ,近年来混沌系统在密码学领域中得到了较多研究 .该文提出一种基于混沌的序列密码生成方法 ,该方法通过随机改变混沌映射的参数来提高混沌的复杂性 .同时在有限精度实现时 ,通过引入扰动序列使得输出的混沌序列具有良好的自相关性、均匀分布特性和随机统计特性 ,而且其周期可用混沌参数改变的周期与扰动序列的周期的乘积来度量 .理论研究和模拟结果表明 ,该混沌序列加密方法具有较好的保密性并且便于软硬件实现
Since chaotic systems are very sensitive to initial conditions and chaotic parameters and chaotic sequences are non-periodic and pseudo-random, chaotic systems have been studied more and more in the field of cryptography in recent years.This paper proposes a new chaotic system based on chaos This method improves the complexity of chaos by randomly changing the parameters of chaotic map.At the same time, when the finite precision is implemented, the chaotic sequence of chaotic sequence is output with good autocorrelation, uniform distribution and stochastic statistics Characteristics, and the period can be measured by the product of the chaotic parameter change period and the period of the perturbation sequence.Theoretical research and simulation results show that the chaotic sequence encryption method has better confidentiality and is convenient for software and hardware implementation