基于Cat映射和Lu混沌映射的图像加密方案  

Image Encryption Scheme Based on Cat Map and Lu Chaotic Map

作　　者：张健[1] 于晓洋[1] 任洪娥[2] 

机构地区：[1]哈尔滨理工大学测控技术与通信工程学院,哈尔滨150040 [2]东北林业大学信息与计算机工程学院,哈尔滨150000

出　　处：《电子器件》2007年第1期155-157,共3页Chinese Journal of Electron Devices

摘　　要：由于混沌系统对初始条件和混沌参数非常敏感,以及生成的混沌序列具有伪随机性的特性,近年来在图像加密领域得到了广泛的应用.经典的Arnoldcat映射通过迭代虽然可以改变图象各像素点的位置,但是多次迭代之后会还原出原始图像,给系统带来一定的安全隐患.使用Arnoldcat映射和Lu混沌映射可以有效地避免这一缺点,从而实现混淆和扩散的目的.通过仿真实验,结果分析表明该种方法能够得到令人满意的加密效果.Chaos is widely used in image encryption because of its high sensitivity to initial conditions and parameters and its stochastic series. Classical Arnold cat map can change the position of image pixel points through iteration, but these pixel points will return to the original position after iterating many times. So it will bring some dangerous to the system. The shortcoming can be avoided by using Arnold cat map and Lu chaotic map, and it can attain the purpose of confusion and diffusion. Through theoretical analysis and simulation, the method was proved to work well.

关 键 词：混沌 图像加密 CAT映射 Lu混沌映射 

分 类 号：TP309.07[自动化与计算机技术—计算机系统结构]