一种基于混沌序列的彩色图像加密算法  

A new color image encryption algorithm based on chaos sequences

作　　者：孟建良[1] 庞会静[1] 高婉青[1] 

机构地区：[1]华北电力大学计算机科学与技术学院,河北保定071003

出　　处：《华北电力大学学报（自然科学版）》2009年第4期81-84,共4页Journal of North China Electric Power University：Natural Science Edition

摘　　要：针对现有彩色图像加密方法的不足,提出了一种基于混沌序列排序的加密算法。该算法首先对彩色图像进行位置上的置乱,设置图像矩阵与混沌序列的一一对应关系,然后通过对混沌序列排序引导图像矩阵行列分别排序。在此基础上,为了提高保密性,又对置乱之后的彩色图像进行像素值的置换操作,该操作通过混沌序列排序来引导彩色图像每个像素点的三基色像素值发生互换,从而实现对颜色的加密。实验结果表明:该算法具有密钥空间大、安全性高和保密性好的特点。An encryption algorithm based on chaotic sequences ranking was presented aimed at the deficiency of the existing color image encryption method. Firstly, the algorithm scrambles the position of color image and sets one - to - one relationship between the image matrixand chaotic sequence. Then the row and column of image matrix ranking were guided by the chaotic sequence ranking. On this basis, in order to improve privacy, the pixel value of the scrambled color image is shuffled. In this shuffling, the tricolor pixel values of each pixel in color image interchange guided by the chaotic sequence ranking, so realizing the Color encryption. This results demonstrate that this algorithm has a large space of keys, high secure and good privacy.

关 键 词：混沌序列 置乱 置换 彩色图像 排序 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构]