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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 .
Using the idea of undersampled in the design of chaotic secure communication system, the time series of Lorenz system and a typical hyperchaotic system are analyzed.The results show that the security of cryptosystem depends not only on the dimensionality of the system, but also Which is related to the sampling interval selection.The VWK nonlinear test method and the alternative data checking method are used to test the output signals of the above chaotic encryption system at different sampling intervals.