一种基于混沌序列的多级图像加密方法  

A algorithm of multi-level images encryption based on Chaos series

作　　者：许克兵[1] 黄文培[1] 

机构地区：[1]成都市西南交通大学,成都硕士研究生610031

出　　处：《微计算机信息》2007年第05X期38-40,共3页Control & Automation

基　　金：现代通信国家重点实验室基金项目资助(51436050404QT2202);铁道部重点科技开发计划项目(2005X025)

摘　　要：目前,利用混沌映射产生混沌序列的理论(已经成熟,但是混沌序列发生器总是在有限精度下实现,混沌迭代序列必将退化为周期序列。本论文在结合混沌技术和传统密码理论的基础上提出了一种基于混合混沌序列的图像加密方法,可以克服有效精度效应对混沌系统的影响,从而改善混沌序列特性。通过理论分析和仿真结果表明,这种混合混沌序列具有随机性好,实现容易,周期长等优点。此外,在较低实现精度下,能够得到周期大的序列,为在低成本下得到比较实用的序列密码提供了一种新的思路。　At present, the theory of chaos mapping generating chaos series is mature, but chaos series generator always realizes in limited accuracy, thus chaos Computation series must degrade cycle series. This paper points out a method of images encryption on basis of Mixed Chaos series which based on the chaos technology and traditional cryptography theory which overcome the chaos system affection in limited accuracy, thus the feature of chaos series has greatly improved. Theory and result of simulation experiments have confirmed that the series have the advantages of better random nature、easily achieving and the longer cycle. In lower achieving accuracy it also provides a new idea for the practical series cryptography in the lower cost which can get the long cycle series.

关 键 词：LOGISTIC映射 图像置乱 对称群 

分 类 号：TP391[自动化与计算机技术—计算机应用技术] TP311.11[自动化与计算机技术—计算机科学与技术]