吉首大学学报(自然科学版) ›› 2021, Vol. 42 ›› Issue (6): 4-14.DOI: 10.13438/j.cnki.jdzk.2021.06.002

• 计算机 • 上一篇    下一篇

基于5D超混沌的图像加密算法

伍朝阳,周瑛   

  1. (福建技术师范学院,福建 福清 350300)
  • 出版日期:2021-11-25 发布日期:2022-01-21
  • 作者简介:伍朝阳(1975—),男,湖南新邵人,福建技术师范学院实验师,硕士,主要从事计算机应用研究.
  • 基金资助:
    福建省中青年教师教育科研项目(JAT170678)

Image Encryption Algorithm Based on 5D Hyperchaotic System

WU Chaoyang, ZHOU Ying   

  1. (Fujian Polytechnic Normal University, Fuqing 350300, Fujian China)
  • Online:2021-11-25 Published:2022-01-21

摘要:提出了一种新的基于5D超混沌映射的图像加密算法.首先,根据给定的初始密钥,计算5D超混沌系统的迭代初始值,产生混沌序列;然后对混沌序列进行预处理,生成新的混沌序列,对原始图像进行基于列排序和行排序的二维置乱,同时利用循环移位来提高系统的安全性;最后对图像进行扩散操作.实验结果和理论分析表明,新算法具有大的密钥空间并能够抵御多种攻击.

关键词: 5D超混沌系统, 混沌序列, 图像加密, 循环移位, 二维置乱

Abstract: A novel image encryption method is put forward based on 5D hyperchaotic system. At first, initial values of 5D hyperchaotic system are calculated based on secret keys and chaotic sequences are generated. Then chaotic sequences are preprocessed to get new chaotic sequences. Two-dimensional permutation  is executed to plain image based on column and row sorting. The cycle shift is also employed to improve the security of the scheme. Diffusing operation is performed at last and encrypted image is obtained. Experimental results and theoretical analysis prove that the method possesses a large key space and could resist kinds of attacks.

Key words: 5D hyperchaotic map,  , chaotic sequences, image encryption, cycle shift, two-dimensional permutation

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