基于联合置乱的高维超混沌图像加密算法

High dimensional hyperchaotic image encryption algorithm based on joint scrambling

针对图像信息在传输过程中面临着被非法窃取、篡改等威胁的问题,提出了一种基于Arnold变换和DNA混合编码联合置乱的高维超混沌图像加密算法。首先,通过一种八维六次高维超混沌系统产生多个混沌伪随机系列,并经整数化处理,得到多个混沌伪随机整数系列和一个混沌矩阵;然后,采用这些混沌伪随机整数系列动态选取DNA混合编码规则和运算规则,对混沌矩阵和经Arnold变换后的原始图像矩阵进行DNA动态编码、运算和解码,从而实现图像加密;最后,将该算法应用于图像加密,通过计算机仿真进行了加密性能分析。结果表明:所提出的加密算法具有优异的性能,可为图像加密提供可行的选项。

In order to solve problem that image information is facing the threat of illegal theft and tampering during transmission,a high-dimensional hyperchaotic image encryption algorithm based on Arnold transform and DNA mixed coding was proposed.Firstly,several chaotic pseudo-random series were generated by an eight-dimensional sixth-order hyperchaotic system,and then the chaotic pseudo-random series and a chaotic matrix were obtained by integer processing.Then,using these chaotic pseudo-random integer series to dynamically select DNA chaotic coding rules and operation rules,the chaotic matrix and the original image matrix transformed by Arnold transformation were dynamically encoded,operated and decoded so as to realize image encryption.Finally,the algorithm was applied to image encryption,and the encryption performance was analyzed by computer simulations.The results show that the proposed encryption algorithm has excellent performance and can provide a feasible option for image encryption.