摘要
本文首先介绍了如何采用DC攻击法对一类流密码体制进行相关攻击,从而说明在密码学中有必要研究相关免疫(CI)函数.在综述了域F2上相关免疫(CI)函数的研究进展的同时,给出了CI函数在一般有限域上的特性和构造,并进一步研究有限环Z/(m)时的情景.本文详尽描述了CI函数的五种充要条件.最后提出了几个值得研究的未解决的问题.
By means of exploring DC attacks for a kind of stream cipher system, we claim that it is necessary to study correlation immune functions. After summarizing most of up-to-date results of CI functions over F 2 , we give some new special important properties and constructions of CI functions over general finite fields F q . Five equivalence descriptions for CI functions are given in detail. At last, we propose five open problems which are valuable to pay attention to.
出处
《数学进展》
CSCD
北大核心
1997年第5期395-408,共14页
Advances in Mathematics(China)
基金
国家自然科学基金
关键词
相关免疫函数
密码学
相关攻击
流密码体制
cryptography
correlation immunity
linear complexity
permutationpolynomial