通信学报 ›› 2015, Vol. 36 ›› Issue (5): 167-173.doi: 10.11959/j.issn.1000-436x.2015112

• 学术通信 • 上一篇    下一篇

T函数Walsh谱值与差分转移概率快速算法

刘燕,胡斌,徐立平   

  1. 解放军信息工程大学 密码工程学院,河南 郑州 450001
  • 出版日期:2015-05-20 发布日期:2015-07-17
  • 基金资助:
    国家自然科学基金资助项目;国家自然科学基金资助项目;国家自然科学基金资助项目

Efficient algorithm for computing Walsh spectrum and differential probability

IUYan L,UBin H,ULi-ping X   

  1. School of Cryptography Engineering,Information Engineering University,Zhengzhou 450001,China
  • Online:2015-05-20 Published:2015-07-17
  • Supported by:
    The National Natural Science Foundation of China;The National Natural Science Foundation of China;The National Natural Science Foundation of China

摘要:

根据T函数自身输入与输出结构特点,结合T函数窄度相关定义,研究了T函数线性性质和差分性质。通过构造马尔可夫链和概率转移矩阵,给出了其Walsh谱值与差分转移概率计算的多项式时间快速算法,时间复杂度为O(n),并将该算法应用于对TSC系列T函数的研究,得到任意输入输出线性组合的Walsh谱值表达式。

关键词: T函数, 窄度, Walsh谱值, 差分转移概率, 马尔可夫链

Abstract:

According to the characteristic of T-functions,along with the definition of narrow T-functions,the linear prop-erty and differential property were studied.Markov chain and transition matrices were constructed to propose fast algo-rithm for computing Walsh spectrum and differential probability,of which the time complexity is O(n).In addition,the algorithm is applied in the T-functions in TSC-family and finally the result expression is given.

Key words: T-function, narrowness, Walsh spectrum, differential probability, Markov chain

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