基于时空二维混沌序列的变参数混沌加密算法

提出一种基于时空二维混沌序列的可变参数混沌加密体制. 首先采用单向耦合映象格子模型产生时空混沌二值序列, 并对序列进行各项性能分析, 证明混沌序列具有良好的伪随机性. 其次, 采用一种新的变参数混沌加密算法, 将生成的时空混沌二值序列作为原始密钥, 并通过随机改变混沌加密系统的初始参数、 迭代次数及系统参数, 实现了变参数的加密过程. 实验结果表明, 该混沌加密系统中参数的随机变化, 增加了混沌序列的复杂度和长周期性, 具有加密速度快、 安全性高的优点.

Parameter-varying Chaotic Encryption Algorithm Based on Spatiotemporal Two-dimensional Chaos Sequence

A parameter varying chaotic encryption scheme based on spatiotemporal two dimensional chaos sequence is proposed in this paper. One way coupled mapping lattice model was first used to generate spatiotemporal chaos binary sequence and each performance of the sequence was analyzed, which proves that the chaos sequence has a good pseudo randomicity. On the basis of this, a new parameter varying chaotic encryption algorithm was adopted, with the generated spatiotemporal chaos binary sequence as the original encryption key, to realize the parameter varying chaotic encryption through randomly changing the original parameter, iteration times and system parameter of the chaotic encryption system. Experimental results prove that the random varying of parameters in the chaotic encryption system can increase the complexity and long periodicity of the chaos sequence, so that it has the advantage of fast speed encryption and high security.