基于交叉混沌映射的小波域图像加密算法  

Algorithm of image encryption in wavelet domain based on cross chaotic map

作　　者：闫兵[1] 柏森[1,2] 刘博文 阳溢[1] 郭辉[3] Yan Bing;Bai Sen;Liu Bowen;Yang Yi;Guo Hui(Dept.of Information Engineering,Chongqing Communication Institute,Chongqing 400035,China;School of Software,Chongqing Institute of Engineering,Chongqing 400035,China;Unit 61541 of PLA,Beijing 100094,China)

机构地区：[1]重庆通信学院信息工程系 [2]重庆工程学院软件学院 [3]61541部队

出　　处：《计算机应用研究》2018年第6期1797-1799,1811,共4页Application Research of Computers

基　　金：国家自然科学基金资助项目(61272043);重庆市基础与前沿研究计划项目(cstc2013jj B40009);重庆市科技研发基地能力提升项目(cstc2014pt-sy40003);重庆市研究生科研创新项目(cys14239);重庆市教委科学技术研究项目(KJ15012027;KJ1601225)

摘　　要：设计了一种新的图像加密算法,先将图像进行小波变换,再利用交叉混沌映射产生的混沌序列分别对低频和高频系数进行分块置乱;小波逆变换后,再用一组新的混沌序列对置乱后的图像进行扩散。实验证明,该算法密钥空间大、密钥敏感性强,能有效地抵抗暴力攻击、统计攻击和差分攻击。This paper designed a new algorithm of image encryption. This algorithm encrypted the image by block shuffling the wavelet coefficients using chaotic sequences generated from cross chaotic map. It achieved a shuffled image after inverse wavelet transforming,and diffused by a new chaotic sequence. The experimental results demonstrate that key space of this algorithm is big enough,and the keys are sensitive. This proposed algorithm can resist brute-force attacks,statistical attacks and differential attacks efficiently.

关 键 词：图像加密 交叉混沌映射 离散小波变换 分块置乱—扩散 混沌加密 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构]