基于保守混沌系统的图像加密算法  

Image encryption algorithm based on conservative chaotic systems

作　　者：张庆华[1] 张瀚[1] 

机构地区：[1]南开大学信息技术科学学院,天津300071

出　　处：《计算机工程与设计》2009年第10期2387-2389,2393,共4页Computer Engineering and Design

基　　金：天津市自然科学基金项目(07JCYBJC14700)

摘　　要：提出一种新的基于保守混沌系统的图像加密算法。利用给定初始值与参数的离散standard映射生成混沌序列,使用混沌序列构造改进的魔方变换对图像进行置乱,并对各像素点的灰度值与混沌序列进行链式循环异或。算法设计简单、易于实现,避免了耗散混沌系统的固有缺陷,改进了魔方变换的置乱方法,克服了仅使用置乱方法加密图像的缺点。仿真试验与结果分析表明,该算法具有较高的安全性。A new image encryption algorithm is presented on the basis of conservative chaotic systems. This algorithm uses the chaotic sequences created by discrete standard map which initial values and parameters are given to improve magic cube transformation, then, uses the new magic cube transformation to do permutation transforms on image, and performs XOR operation circularly by chain type on gray value ofpixels and chaotic sequence. The algorithm is easily realized due to simple design, and it avoids the inherent defects of dissipative chaotic systems, improves the magic cube transformation and overcomes the encryption algorithm＇s shortcomings only adopting permutation transformation. The simulation tests and analysis indicated that the algorithm has super security.

关 键 词：保守混沌系统 标准映射 魔方变换 混沌序列 图像加密 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构]