一种基于超混沌系统的图像加密算法

Image encryption based on hyperchaotic system

文章针对目前混沌图像加密算法密钥空间小的问题,提出一种基于超混沌系统的图像加密算法.该算法的主要思想是利用两组不同的初始值产生两组不同的随机序列,然后对数字图像进行加密.加密算法主要分为两部分:首先利用随机序列对图像像素进行置乱,其次将置乱后的矩阵利用随机序列进行像素值替代.实验结果以及安全性分析表明:该算法具有较大的密钥空间,较低的相邻像素相关性,并且能够有效抵御穷举攻击和统计攻击.

For the current chaotic image encryption algorithm key problem of small space,proposed a image encryption algorithm based on hyperchaotic system. The main idea is to use two different groups of initial values produce two different random sequence,and encryption of digital image. Encryption algorithm is divided into two parts,first,use the random sequence to scrambled the image pixel,then use the random sequence to replace the pixel for the matrix scrambled. The experiment result indicates that the algorithm has a larger key space,a lower correlation of adjacent pixels,a strong resist ability of exhaustive attack and statistic attack.