基于多维混沌系统的图像加密算法  

Image Encryption Algorithm Based on Multidimensional Chaotic System

作　　者：赵尔凡[1,2] 赵耿[1,2] 郑昊[1,2] 

机构地区：[1]西安电子科技大学通信工程学院,西安710071 [2]北京电子科技学院研究生处,北京100070

出　　处：《计算机工程》2012年第4期119-121,125,共4页Computer Engineering

基　　金：北京市自然科学基金资助项目(4092040)

摘　　要：针对目前低维混沌系统容易遭遇分割攻击的问题,提出一种基于多维混沌系统的图像加密算法。以Arnold、Ushiki及3D Lorenz为基础,采用多轮混淆变换和单轮扩散变换研究不同维的混沌映射,包括对图像像素置乱、密钥流生成以及加密操作符选择运算。实验结果表明,该算法能获得良好的加密效果,具有较高的安全性能及较强的抗攻击能力。Aiming at the problem of divide-and-conquer attacking on the low-dimensional chaotic system, a new image encryption algorithm based on multidimension chaotic system is proposed. Such as Arnold, Ushiki and 3D Lorenz map, on the basis of the research on different chaotic maps, it achieves the structure of more overall rounds of confusion stage and a single diffusion stage. It contains pixel confusion and the key stream, as well as the way of encryption operator generation. Experimental results show that the proposed algorithm can get excellent encryption effect, high security performance, and strong attack against ability.

关 键 词：多维混沌系统 三维Lorenz 混沌密码 图像加密 

分 类 号：TP301.6[自动化与计算机技术—计算机系统结构]