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计算机工程 ›› 2007, Vol. 33 ›› Issue (10): 138-140. doi: 10.3969/j.issn.1000-3428.2007.10.050

• 安全技术 • 上一篇    下一篇

一种新的密钥流发生器设计算法

李昌刚1,张 昕2,朱芳来3,应艳杰1,汪永斌1   

  1. (1. 浙江万里学院电信学院,宁波 315100;2. 浙江万里学院基础学院,宁波 315100;3. 桂林电子工业学院计算机系,桂林 541004)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2007-05-20 发布日期:2007-05-20

New Design Algorithm of Secret Key Stream Generator

LI Changgang1, ZHANG Xin2, ZHU Fanglai3, YING Yanjie1, WANG Yongbin1   

  1. (1. Faculty of Electronics and Information, Zhejiang Wanli College, Ningbo 315100; 2. Junior College, Zhejiang Wanli College, Ningbo 315100; 3. Department of Computer, Guilin Electronics and Industry College, Guilin 541004)
  • Received:1900-01-01 Revised:1900-01-01 Online:2007-05-20 Published:2007-05-20

摘要: 流密码的安全性主要取决于密钥流的随机程度,如何构造随机性良好的密钥序列成为流密码所要研究的首要问题。该文借鉴已有的一些分组密码,如DES﹑RC5等设计中的某些产生良好非线性的方法,提出了一种产生伪随机密钥的方法,并对它们的随机性进行了理论分析。分析结果表明,该算法具有良好的安全性。

关键词: 流密码, RC5算法, S盒, DES算法, 分组密码

Abstract: The security of stream cipher is mainly dependent on the randomness degree of the secret key stream. How to design key stream with perfect randomness turns into the main problem. This paper considers some properties of block ciphers such as DES and RC5, in which there are some favorable nonlinear generating methods. It designs a new algorithm to generate a pseudo-random sequence. The randomness of the sequence is analyzed. The result indicates that the algorithm is safe.

Key words: Stream cipher, RC5 algorithm, S-box, DES algorithm, Block cipher

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