基于混沌的位级图像加密算法研究  

Research on the Bit-Level Image Encryption Algorithm Based on Chaos

作　　者：吴新华[1] 

机构地区：[1]南通纺织职业技术学院现教中心,江苏南通226007

出　　处：《微电子学与计算机》2013年第12期69-72,共4页Microelectronics & Computer

基　　金：国家自然科学基金项目(61004027;61174066);江苏省自然科学基金项目(BK2010275);南通市应用研究计划项目(K2010017;BK2012032);江苏省高校自然科学研究项目(10KJB120002)

摘　　要：提出了一种新的位级图像混沌加密算法.首先将平文图像划分为8幅位级图像并将其作为一个整体,利用Chen′s混沌系统生成混沌序列,进行位级图像置乱,然后利用Logistic混沌序列进行图像像素扩散,最后进行测试仿真和性能分析,并与其他图像加密算法进行比较,测试结果表明所提算法具有较强的安全性和有效性.A new bit-level image encryption algorithm based on chaos is presented with the properties of chaotic sequences and inherent characters of bit-level images. At first, the plain image is divided into 8 bit-level images which are treated as a group. And the bit-level images＇ group is permutated using chaotic sequences generated by Chen＇s chaotic map. Then the image pixel-level diffusion is carried on using Logistic chaotic sequences. Finally, experiments have been carried out to compare its performance with that of other schemes, and the results justify the superior security of our proposed algorithm.

关 键 词：混沌 图像加密 位级图像 置乱 扩散 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构]