基于混沌同步的保密通信

Secure Communication Based on Chaos Synchronization

研究了基于混沌系统完全同步化的保密通信问题。根据所要传输的信号,将混沌系统中的某一参数加以改变。通过自适应控制方法,在混沌系统同步化的基础上分别识别出系统的原参数和改变后的参数,进行分析比较后复原传输信号。利用Lyapunov稳定性定理和Barbalat定理,严格证明了同步方法的正确性。同时,以高维的Rossler系统为例进行了数值仿真,验证了保密通信方案的有效性。

This paper investigates the problem of secure communication based on chaos synchronization.According to the message transported,one of the parameters of the chaotic system is changed.By using the method of adaptive control,the former parameter and the changed parameter can be identified respectively.After comparing the two parameters,the message is recoveried.Theoretical result is proved to be effective though Lyapunov stability theory and Barbalat theory. Finally ,the hyperchaofic Rossler system is taken as an example to verify the utility of the communication scheme.