【摘要】 把欠采样的思想用于混沌保密通信系统的设计中 ,对Lorenz系统及一种典型的超混沌系统的时间序列进行了分析 .研究发现 ,加密系统的安全性不仅取决于系统维数 ,而且还与采样间隔的选取有关 .用VWK非线性检验方法和替代数据检验方法对上述混沌加密系统在不同采样间隔时的输出信号进行了检验 .更多还原

【Abstract】 In this note, we apply the sub_sampling idea to the design of the chaotic secure communication system and analyze the Lorenz system and a kind of hyper chaotic system. The result obtained indicates that the security of the cryptosystem is not only determined by the dimension, but also related with the sampling interval. Then, we verify these two systems using the VWK (Volterra_Wiener_Korengerg) nonlinear test and surrogate data test methods.更多还原