基于高维广义超混沌猫映射的彩色图像加密算法  

Color Image Encryption Algorithm Based on High Dimensional Extensive Hyper Chaotic Cat Maps

作　　者：彭嘉星 鲍芳[1] 

机构地区：[1]广东工业大学自动化学院,广东广州510006

出　　处：《工业控制计算机》2016年第7期74-75,共2页Industrial Control Computer

摘　　要：提出了一种基于高维广义超混沌猫映射的数字彩色图像加密算法。该算法首先是对原始数字彩色图像的R、G、B分量进行编排处理,再采用二维广义猫映射置乱图像像素位置和八维广义猫映射扩散像素值,置乱与扩散过程交替进行数轮后,再对图像进行拆分整合得到加密图像。这种高维广义猫映射存在两个正的李指数,属于超混沌映射,能进一步改善置乱和扩散效果,再加上R、G、B分量的编排处理,提高了图像加密的安全性。通过MATLAB软件仿真,对密钥空间、直方图进行了测试和分析,验证了算法的可行性、安全性和保密性。This paper presents a digital color image encryption algorithm based on high dimensional extensive hyper chaotic cat maps.First is the R,G and B components of original digital color image are arranged,and then scrambling pixel coordinates by using two-dimensional extensive cat map and diffusing the value of pixel by using eight-dimensional exten- sive cat map for the processed imageAfter two processes of scrambling and diffusion are alternating many rounds,image encrypted is obtained by splitting processed image and integrating R,G and B components.The high dimensional extensive cat map has two positive Lyapunov exponents,belonging to the hyper chaotic map.

关 键 词：数字彩色图像加密 超混沌 猫映射 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构]