针对单混沌系统可能会出现的动力学特性退化的缺陷,基于多混沌系统和开关技术,提出开关控制混沌伪随机比特发生器(Switch Controller Chaos & Pseudo Random Bit Generalor,简称SCS—PRBG).通过对SCS—PRBG密钥流及其性能的理论分析,表明该数字流密码具有较好的随机性与安全性,并且在硬件并行计算的环境下可以极大地提高加密速度.实验研究表明本加密算法具有较高的安全性.
Regarding to degeneration of dynamics characteristics in a traditional single chaotic system, we propose a switch controller chaos & pseudo random bit generator (SCS-PRBG) based on multiple chaotic systems and switch control. Theoretic analysis of random key stream and its performance show that the key stream has better randomicity and security. With parallel computation, the speed of encryption is improved. The expfiment indicates better security of this algorithm.