基于动态混沌映射的跨平面彩色图像加密算法  

Cross-plane Color Image Encryption Algorithm Based on Dynamic Chaotic Mapping

作　　者：葛斌[1] 代高乐 GE Bin;DAI Gao-le(College of Computer Science and Engineering,Anhui University of Science&Technology,Huainan 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：《通化师范学院学报》2022年第8期1-10,共10页Journal of Tonghua Normal University

基　　金：国家自然科学基金资助项目(6210071479);安徽省自然科学基金项目(2108085QF258).

摘　　要：针对传统二维Henon映射混沌范围小、李雅普诺夫指数小、彩色图像各通道的像素相关性高的问题,提出一种融合动态二维Henon余弦映射(2D Henon-Cos-LogisticMap,2D HCLM)和跨平面置乱的自适应彩色图像加密算法.该算法利用SHA-512对明文图像进行操作,将得到的密钥处理后作为2D HCLM映射的初始值,再交换三通道的像素点进行一轮跨平面置乱,根据2D HCLM混沌映射产生的混沌序列进行二轮排序置乱,最后对像素值进行两轮非序列扩散得到加密图像.仿真实验表明:该算法可适应任意大小彩色图像,能从视觉上完全隐藏明文信息,可有效抵抗常见的直方图、统计和差分等攻击手段.The dynamic TWO-DIMENSIONAL Henon cosine Map(2D Henon-cos-Logistic Map,2D HCLM)and cross-plane scrambling were proposed to solve the problems of small chaos range,small Ly‐apunov index and high pixel correlation of each channel of color image.An adaptive color image encryp‐tion algorithm is designed by using 2D HCLM,cross-plane scrambling,extended Z-shape transform and non-sequence diffusion.The algorithm using the SHA-512 the clear image,will be the key for processing as the initial value of 2d HCLM mapping,after then three-channel across planar scrambling and zigzag scrambling,according to the 2d HCLM chaotic sequence produced in a chaotic mapping secondary sort scrambling,finally to two rounds of the pixel values spread sequence to encrypt the image.The simulation results show that the algorithm can adapt to color images of any size,completely hide plaintext information from vision,and effectively resist common attack methods such as statistics,noise and difference.

关 键 词：动态二维Henon余弦映射 自适应彩色图像加密 跨平面置乱 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构]