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计算机工程 ›› 2007, Vol. 33 ›› Issue (20): 162-164. doi: 10.3969/j.issn.1000-3428.2007.20.056

• 安全技术 • 上一篇    下一篇

基于多个Logistic映射的分组加密算法

王 永1,2,李盛竹1,杜茂康1,罗龙艳1,杨德刚2,3   

  1. (1. 重庆邮电大学经济管理学院,重庆 400065;2. 重庆大学计算机科学与工程学院,重庆 400044;3. 重庆师范大学数学与计算机科学学院,重庆 400047)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2007-10-20 发布日期:2007-10-20

Block Encryption Algorithm Based on Multiple Logistic Maps

WANG Yong1,2, LI Sheng-zhu1, DU Mao-kang 1, LUO Long-yan1, YANG De-gang2,3   

  1. (1. School of Economy and Management, Chongqing University of Posts and Telecommunications, Chongqing 400065; 2. School of Computer Science, Chongqing University, Chongqing 400044; 3. School of Mathematics and Computer Science, Chongqing Normal University, Chongqing 400047)
  • Received:1900-01-01 Revised:1900-01-01 Online:2007-10-20 Published:2007-10-20

摘要: 分析了设计加密算法时应该注意的问题,并在此基础上,提出了一种基于多个logistic映射的分组加密算法。该算法中使用了多个混沌映射,有效地扩展了其密钥空间。加密过程中,子密钥序列以密文反馈和从混沌映射中抽取数据相结合的方式产生,这使子密钥序列在保持良好的均匀分布和随机统计特性的同时,还与明文相关,有效地增强了算法的安全性。理论分析和模拟试验表明,该加密算法具有加密速度快,保密性好等优点。

关键词: 混沌, 分组加密, 密码系统, 安全

Abstract: This paper points out the issues which should be considered when a chaotic cryptosystem is designed. A block encryption algorithm based on multiple logistic maps is proposed. Owing to the multiple chaotic maps, the key space of cryptosystem is extended. With the ciphertext feed back, the subkey sequences is generated from the chaotic maps. The subkey sequences have good uniform distribution property, random statistical property and have relation to the plaintext, which enhance the security of the cryptosystem. Theoretical study and computer simulation results show that the cryptosystem has a high speed and good security.

Key words: chaos, block encryption, cryptosystem, security

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