计算机应用 ›› 2015, Vol. 35 ›› Issue (12): 3447-3449.DOI: 10.11772/j.issn.1001-9081.2015.12.3447

• 信息安全 • 上一篇    下一篇

一类低频重零化子的推导及频谱分析

胡建勇, 张文政   

  1. 保密通信重点实验室, 成都 610041
  • 收稿日期:2015-05-22 修回日期:2015-07-28 出版日期:2015-12-10 发布日期:2015-12-10
  • 通讯作者: 胡建勇(1990-),男,江西新余人,硕士研究生,主要研究方向:密码学
  • 作者简介:张文政(1966-),男,四川成都人,研究员,硕士,主要研究方向:密码学。
  • 基金资助:
    2014年保密通信重点实验室基金资助项目(9140C110203140C11049)。

Derivation and spectrum analysis of a kind of low weight spectral annihilator

HU Jianyong, ZHANG Wenzheng   

  1. Science and Technology on Communication Security Laboratory, Chengdu Sichuan 610041, China
  • Received:2015-05-22 Revised:2015-07-28 Online:2015-12-10 Published:2015-12-10

摘要: 针对序列密码实现有效的离散傅里叶频谱攻击,前提条件是寻找到序列的低频重乘积关系或低频重零化子。利用周期序列的离散傅里叶变换,得到满足乘积关系序列的一个充要条件,并以此为基础,定义频谱循环差分,推导出一类低频重乘积关系和低频重零化子。同时研究了m序列的频谱性质,给出了m序列的频谱空间快速计算方法以及计算实例。

关键词: 低频重, 乘积关系, 零化子, 频谱循环差分, 频谱空间

Abstract: For stream cipher to implement effective fast discrete Fourier spectra attack, it is necessary to find a low spectral weight relation or a low spectral weight annihilator. By using discrete Fourier transform of periodic sequences, a necessary and sufficient condition of the sequences which meet product relation was achieved. And on this basis, by defining spectral cycle difference, a kind of low spectral weight relation and annihilator was derived. At the same time, the spectral properties of m sequences was researched, a method to calculate the spectral space quickly was proposed and an example was given.

Key words: low spectral weight, product relation, annihilator, spectral cycle difference, spectral space

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