基于掺铒光纤激光器超混沌特性的图像加密算法

吉林大学学报(工学版) ›› 2012, Vol. 42 ›› Issue (增刊1): 405-409.

基于掺铒光纤激光器超混沌特性的图像加密算法

刘鹏¹, 田小建¹, 曹军胜², 杨悦¹

1. 吉林大学电子科学与工程学院,长春 130022;
2. 中国科学院长春光学精密机械与物理研究所,长春130033

收稿日期:2011-01-11 出版日期:2012-09-01 发布日期:2012-09-01
通讯作者: 杨悦(1977-),女,讲师.研究方向:医学图像处理.E-mail:yangyue@jlu.edu.cn E-mail:yangyue@jlu.edu.cn
作者简介:刘鹏(1978-),男,博士研究生.研究方向:超混沌数字加密.E-mail:xinzhi000@163.com
基金资助:
国家自然科学基金项目(61006054).

Image encryption algorithm based on hyper-chaos of Er-doped fiber laser

LIU Peng¹, TIAN Xiao-jian¹, CAO Jun-sheng², YANG Yue¹

1. College of Electronic Science and Engineering, Jilin University, Changchun 130022, China;
2. Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China

Received:2011-01-11 Online:2012-09-01 Published:2012-09-01

摘要/Abstract

摘要： 针对基于低维混沌系统的图像加密算法安全性不高的问题,提出了一种新的基于掺铒光纤激光器(Er-doped fiber laser,EDFL)超混沌特性的数字图像加密算法。算法包括置乱和扩散两个阶段:首先利用离散标准混沌映射对明文图像像素位置进行置乱,同时为了提高算法效率,通过像素间的异或操作将扩散效果引入置乱阶段。然后利用EDFL超混沌系统产生的值加密置乱后的像素值,从而得到密文图像。试验结果表明:本文算法密钥空间大,密文对密钥和明文充分敏感,只需置乱和扩散的一轮循环即可获得良好的加密效果和较高的安全性能。

关键词: 信息处理技术, 图像加密, 超混沌, 掺铒光纤激光器, 扩散

Abstract: For the problem that the security of image encryption algorithm based on low-dimensional chaotic is not high, a new digital image encryption algorithm based on hyper-chaos behavior in Er-doped fiber laser (EDFL) was proposed. The algorithm consists of the substitution stage and the diffusion stage: first the pixel position of plain-image was shuffled using discrete standard chaotic mapping, meanwhile, the diffusion effect was lead into the substitution stage by XOR operations between pixels to improve the efficiency of the algorithm. Then, the values which generated by EDFL hyper-chaos system was used to encrypt the scrambling pixels, thereby obtain cipher-images. The experimental results demonstrate that the proposed encryption algorithm having large key space, high sensitive to the secret keys and plain-image, good effect of encryption and high security level can be achieved by only one total round of substitution and diffusion.

Key words: information processing, image encryption, hyper-chaos, er-doped fiber laser, diffusion

中图分类号:

TN911.7

刘鹏, 田小建, 曹军胜, 杨悦. 基于掺铒光纤激光器超混沌特性的图像加密算法[J]. 吉林大学学报(工学版), 2012, 42(增刊1): 405-409.

LIU Peng, TIAN Xiao-jian, CAO Jun-sheng, YANG Yue. Image encryption algorithm based on hyper-chaos of Er-doped fiber laser[J]. 吉林大学学报(工学版), 2012, 42(增刊1): 405-409.

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