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计算机工程 ›› 2007, Vol. 33 ›› Issue (12): 172-174. doi: 10.3969/j.issn.1000-3428.2007.12.060

• 安全技术 • 上一篇    下一篇

基于分数傅里叶变换的混沌图像加密方法

王银花1,2,柴晓冬1,周成鹏1,冯兆艳1,左言胜1   

  1. (1. 安徽大学计算智能与信号处理教育部重点实验室,合肥 230039;2. 铜陵学院电气工程系,铜陵 244000)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2007-06-20 发布日期:2007-06-20

Image Encryption Method Based on Chaotic Sequences and Fractional Fourier Transform

WANG Yinhua1,2, CHAI Xiaodong1, ZHOU Chengpeng1, FENG Zhaoyan1, ZUO Yansheng1   

  1. (1. Key Lab of Intelligent Computing and Signal Processing, Ministry of Education, Anhui University, Hefei 230039; 2. Department of Electrical Engineering, Tongling College, Tongling 244000)
  • Received:1900-01-01 Revised:1900-01-01 Online:2007-06-20 Published:2007-06-20

摘要: 基于混沌映射的图像置乱是图像加密的一种常用方法,加密过程利用Logistic混沌动力学系统过程既非周期又不收敛,且对初始条件敏感的特性,产生实数值混沌序列。对数字图像进行空域置乱和分数傅里叶变换,实现图像的双重加密。计算机模拟表明该方法具有很好的加密效果。

关键词: 混沌, 分数傅里叶变换, 图像置乱, 图像加密

Abstract: The picture scrambling algorithms based on chaos are frequently used for images secure communications. This computing method harnesses the randomicity and the sensitivity of the original value of the Logistic chaotic sequence, to generate the real value sequence. This paper presents an image encryption technology based on chaotic sequences and fractional Fourier transform. The experimental results show that the technology is valid and has good security.

Key words: Chaos, Fractional Fourier transform, Image scrambling, Image encryption

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