计算机应用 ›› 2011, Vol. 31 ›› Issue (07): 1909-1911.DOI: 10.3724/SP.J.1087.2011.01909

• 信息安全 • 上一篇    下一篇

应用Henon超混沌系统改进的图像加密

乐鸿辉,李涛,石磊   

  1. 江苏科技大学 张家港校区,江苏 苏州 215600
  • 收稿日期:2010-12-28 修回日期:2011-01-29 发布日期:2011-07-01 出版日期:2011-07-01
  • 通讯作者: 乐鸿辉
  • 作者简介:乐鸿辉(1990-),男,江苏张家港人,主要研究方向:网络信息安全、数字图像处理;李涛(1979-),男,湖北宜昌人,讲师,硕士,主要研究方向:网络信息安全;石磊(1989-),男,江苏连云港人,主要研究方向:网络信息安全。

Improved algorithm based on Henon Hyperchaotic system for image encryption

Hong-hui LE,Tao LI,Lei SHI   

  1. College of Zhangjiagang,Jangsu University of Science and Technology,Suzhou Jiangsu 215600,China
  • Received:2010-12-28 Revised:2011-01-29 Online:2011-07-01 Published:2011-07-01
  • Contact: Hong-hui LE

摘要: 为提高混沌系统图像加密的安全性,提出了一种结合MD5信息摘要的混沌图像加密算法。新算法使明文的信息摘要值参与Henon超混沌系统的初始化,增强了明文的敏感性,也比一般的混沌系统更具复杂性。同时,改进的二进制密码流序列生成算法导致分组长度动态变化,进一步扰乱了混沌系统的原有特性及密码流的分组特征。理论分析和实验说明算法能有效地抵御选择明文攻击、差分攻击和分割攻击。

关键词: 图像加密, Henon, 超混沌, MD5, 安全

Abstract: To enhance the security of image encryption algorithm in chaotic systems, a new algorithm based on the combination of MD5 and chaotic system was proposed. Allowing MD5 value of original image to participate in the initialization of Henon hyperchaotic system, the algorithm increased the sensitivity of original image and was much more complex than the ordinary system. In addition, the altered algorithm of binary code stream sequence generation could lead to dynamic change of block length so as to further disrupt the original characteristic of chaotic system and the packet characteristics of the code stream. This algorithm could resist chosen plaintext attack, differential attack and partition attack effectively, which has been verified by analysis and experiment.

Key words: image encryption, Henon, Hyperchaotic, MD5, security