基于Hyperhenon映射的数字图像DCT域加密技术  

Digital image DCT domain encryption method based on Hyperhenon mapping

作　　者：李鹏[1] 张雪锋[1] 田东平[1] 

机构地区：[1]西安邮电学院信息与控制系,陕西西安710061

出　　处：《计算机工程与设计》2008年第9期2212-2214,共3页Computer Engineering and Design

基　　金：陕西省自然科学基础研究计划基金项目(2004A15);陕西省教育厅专项科研计划基金项目(06JK194)

摘　　要：结合混沌序列提出了一种新的图像加密算法。首先应用Hyperhenon映射产生混沌序列,对图像在时域上做加密预处理;然后对预处理的结果图像进行DCT变换,应用Logistic映射产生的混沌序列对DCT变换的系数矩阵进行魔方变换置乱,同时给出了图像加密效果的评价指标。实验结果表明,该方法的安全性和加密效果良好。An improved image encryption method isproposed based on chaotic sequence. Firstly, chaotic sequences are generated based on Hyperhenon mapping and it is applied to pre-encrypt the image in spatial domain, Then further processing are used for pretreated image, including DCT and coefficient scrambling based on Logistic mapping. A method of accessing the effect of encryption is also presented. Simulation results indicate that the method has good efficiency and security characteristic.

关 键 词：混沌序列 Hyperhenon映射 图像加密 DCT变换 置乱 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]