像素值与比特位双重置乱混沌图像加密  

Chaotic Image Encryption Using Double Scrambling of Pixel Value and Bit

作　　者：宦立鑫 葛斌[1] HUAN Lixin;GE Bin(School of Computer Science and Engineering,Anhui University of Science and Technology,Huainan Anhui 232001,China)

机构地区：[1]安徽理工大学计算机科学与工程学院,安徽淮南232001

出　　处：《佳木斯大学学报（自然科学版）》2022年第6期22-25,32,共5页Journal of Jiamusi University：Natural Science Edition

基　　金：国家重点研发计划项目(2020YFB1314103)。

摘　　要：针对现有的一维混沌映射混沌范围窄且不连续,使用切比雪夫映射(Chebyshev map)调制无限折叠映射(Infinite collapse map),提出了CICM。通过分岔图,Lyapunov指数以及0-1测试证明了该混沌映射具有更好更连续的混沌行为;进一步提出了基于该混沌映射的图像加密算法,该算法根据明文图像信息产生加密密钥以抵抗选择明文攻击,在置乱阶段实行像素值与比特位的双重置乱。实验结果表明,该算法有效的降低了明文图像相邻像素之间的相关性,并能抵抗统计攻击,具有较高的安全性。In order to solve the problem of narrow and discontinuity chaotic range of existing one-dimensional chaotic map,the Chebyshev map is used to modulate the Infinite collapse map to generate CICM.It is proved that the chaotic map has better and more continuous chaotic behavior by bifurcation diagram,Lyapunov exponent and 0-1 test.Furthermore,an image encryption algorithm based on the chaotic map is proposed.The algorithm generates secret key according to the plain image to resist the selective plaintext attack,and implements the double scrambling of pixel values and bits in the scramb-ling phase.The experimental results show that the algorithm effectively reduces the correlation between the adjacent pixels of the plain image,and can resist statistical attacks,with high security.

关 键 词：混沌映射 图像加密 置乱 密钥 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构]