基于多混沌的彩色图像加密算法研究

Research on Color Image Encryption Algorithm Based Multi-chaos

针对混沌系统产生的混沌序列具有遍历性、伪随机性、对初始条件(值)和系统参数敏感以及具有类似白噪声等特点,提出了一种利用多个混沌系统结合的方法对彩色图像进行加密的算法。首先利用Arnold变换对图像进行像素置换,然后利用统一混沌系统对图像像素加密处理,在加密的过程中利用Logistic混沌系统对统一混沌系统序列进行乱序处理。仿真结果证明,该图像加密算法具有密钥空间大,保密性好,加密速度快和加密强度高等优点。

Chaotic system has several good properties such as ergodicity, pseudo-random, their sensitive dependence on initial condition and system parameters and like white noise and so on. In this paper, a new color image encryption scheme is presented, in which adopt multi-chaos system for shuffling the postions and encrypted color plain image＇s pixel grey value by unified chaos system sequence, in which it changed by logistic chaos system in the process of encryption. Experimental results demonstrate that the color image encryption algorithm shows advantages of larger key space, higher security, faster encryption speed and highly efficiency.