计算机工程 ›› 2006, Vol. 32 ›› Issue (23): 168-170.doi: 10.3969/j.issn.1000-3428.2006.23.060

• 安全技术 • 上一篇    下一篇

基于一维离散混沌映射的图像加密算法分析

李 力,朱从旭,陈志刚   

  1. (中南大学信息科学与工程学院,长沙 410083)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2006-12-05 发布日期:2006-12-05

Image Encryption Algorithm Cryptanalysis Based on One-dimensional Discrete Chaotic Map

LI Li, ZHU Congxu, CHEN Zhigang   

  1. (School of Information Science & Engineering, Central South University, Changsha 410083)
  • Received:1900-01-01 Revised:1900-01-01 Online:2006-12-05 Published:2006-12-05

摘要: 指出文献[1]设计的加密算法中的替代变换算法不能抵抗已知明文攻击,由极少的明密文对就可求出密钥;且置换变换算法没有提供足够的密钥空间。据此提出了一种对该算法的攻击方案,并用实例对该加密算法进行攻击,证明攻击方案完全有效。同时,也提出了对该算法的改进建议。

关键词: 混沌序列, 序列密码, 图像加密, SP网络

Abstract: This paper points out that the substitute encryption algorithm proposed in reference1 cannot resist known-plaintext attack. The analyses show that the key of this cipher can be found with very few known plaintext-cipher pairs; and the permutation algorithm is only provided with very small key space. So an attack scheme is proposed, and the example of the attack scheme successfully brokes the encryption algorithm. A proposal for improvement algorithm is proposed, too.

Key words: Chaotic sequences, Sequence cipher, Image encryption, SP network