基于混沌系统的图像加密算法  

New Image Encryption Algorithm Based on Chaos System

作　　者：孙鑫[1] 易开祥[2] 孙优贤[3] 

机构地区：[1]上海大学机电工程与自动化学院,上海200072 [2]浙江大学CAD & CG国家重点实验室,杭州310027 [3]浙江大学工业控制技术研究所,杭州310027

出　　处：《计算机辅助设计与图形学学报》2002年第2期136-139,共4页Journal of Computer-Aided Design & Computer Graphics

基　　金：国家自然科学基金 ( 6 97730 2 0和 6 982 30 0 3)资助

摘　　要：混沌序列具有容易生成、对初始条件敏感以及具备白噪声的统计特性等特点 .混沌序列的离散映射也具有其相似的特性 .文中讨论了一种以实数值混沌序列为基础、利用图像置乱变换技术 ,实现基于空域或频域的数字图像加密算法 .该算法具有较高的安全性 ,实验结果令人满意 .Chaotic sequences have several good properties including the ease of their generation, their sensitive dependence on initial condition and noise like. In this paper, we discussed an image encryption arithmetic based on chaotic sequences. We generate the real number value chaotic sequences by using the key value and disperse them into symbol matrix and transformation matrix. We implement the image encryption algorithm based on the technique of image scrambling transformation in space or frequency domain. Our algorithm provides good security. Experimental results are satisfactory.

关 键 词：混沌序列 排列变换 DCT 图像加密算法 混沌系统 空域算法 计算机 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]