基于Logistic混沌映射与Arnold变换的图像加密算法  

An Image Encryption Algorithm Based on Logistic Chaotic Maps and Arnold Transform

作　　者：杨恒伏[1] 伍雁鹏[2] 田祖伟[1] 

机构地区：[1]湖南第一师范学院信息技术系,湖南长沙410205 [2]邵阳学院网络中心,湖南邵阳422000

出　　处：《衡水学院学报》2008年第4期40-42,57,共4页Journal of Hengshui University

基　　金：湖南省教育厅资助项目(04B016);邵阳市科技项目(53J07);湖南省第一师范学校资助项目

摘　　要：传统的Arnold变换能改变图像象素的位置,而不能改变图像象素值,不能仅仅靠Arnold变换来实现图像加密.本文结合Logistic映射的伪随机性与对初值的敏感性,提出一种新的基于Arnold变换的图像加密算法,改进后的算法不仅改变了图像象素的位置,也改变了图像象素值.matlab仿真实验表明了该算法的有效性与安全性.Classical Arnold transform can change the position of image pixel points, but not the pixel value. It is obviously not enough to carry on the encryption by using the Arnold transform only. A new image encryption algorithm based on Arnold transform is proposed by exploiting the pseudo-randonmess and the initial sensitivity of chaotic maps. The proposed schema changes the position and pixel value of the image. Simulated experiments show the security and the effectiveness of the algorithm.

关 键 词：图像加密 混沌映射 ARNOLD变换 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构]