基于离散数字混沌序列的图像加密  

Image Encryption through Discrete Digital Chaotic Sequence

作　　者：陈帅[1] 钟先信[1] 石军锋[1] 朱士永[2] 

机构地区：[1]重庆大学光电技术及系统教育部重点实验室,重庆400030 [2]淮南师范学院物理系电子教研室,淮南232001

出　　处：《电子与信息学报》2007年第4期898-900,共3页Journal of Electronics & Information Technology

基　　金：国家973项目(G1999033105);重庆市自然科学基金(2005BB2198);重庆市科技计划项目(8673);安徽省高等学校自然科学研究项目(2005KJ092);淮南师范学院青年教师自然科学研究项目(2004LKQ01)资助课题

摘　　要：由幅值连续的Logistic混沌公式研究了一种幅度值离散数字混沌序列的产生方法,可方便用于硬件实现图像加密。采用函数运算方法由3个不同周期的离散数字混沌序列“异或”运算获得长周期图像加密序列,将图像加密序列与原始图像“异或”加密图像。加密和解密仿真对比可见,该方法对初始值具有敏感性。分析表明,所获得的幅度离散数字混沌序列产生方法具有算法简单,信息安全可靠性高,便于硬件实现的特点。Study a new formula for amplitude discrete chaotic sequence to encrypt images under hardware devices conveniently from Logistic mapping formula for continuous amplitude, and generate a longer period sequences by exclusive OR algorithm with three amplitude discrete digital chaotic sequence in different periods, The image is encrypted by exclusive OR algorithm with the longer period image encrypting sequence and original image. The method is sensitive to initial values through simulation of encrypting and decrypting image. The result shows that the manner to generate amplitude discrete chaotic sequence is simple and more secure for information security, more convenient for hardware to encrypt images.

关 键 词：图像加密 幅度离散 混沌序列 异或运算 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]