基于高维混沌系统组合的图像加密新算法  

New image encryption algorithm based on combined high-dimension Chaotic system

作　　者：李云[1] 韩凤英[1] 

机构地区：[1]长沙航空职业技术学院,长沙410014

出　　处：《计算机工程与应用》2009年第1期103-104,107,共3页Computer Engineering and Applications

基　　金：湖南省自然科学基金;湖南省教育厅资助科研课题~~

摘　　要：提出了一种基于高维混沌系统组合的图像加密算法。该算法首先利用广义猫映射对图像进行置乱,然后利用Lorenz系统对置乱后的图像进行替代变换。研究结果表明,该算法具有良好的像素值混淆、扩散性能和较大抵抗强力攻击的密钥空间,加密图像像素值具有类随机均匀分布特性,且相邻像素的值具有零相关特性。这些结果表明所提出的方案具有较高安全性。A new image encryption algorithm based on combined high-dimension chaotic system is presented.Firstly,it uses the generalized cat mapping to diffuse the image,then it uses the Lorenz system to confuse the diffused image.The results demonstrate that the algorithm has good properties of confusion and diffusion.The key space is large enough to resist the bruteforce attack.For the encrypted image the distribution of pixel-values has a random-like behavior and the values of adjacent pixels satisfy zero correlation, showing that the proposed scheme is of relatively high security.

关 键 词：混沌 图像加密 广义猫映射 LORENZ 替代 置乱 

分 类 号：TP393.08[自动化与计算机技术—计算机应用技术]