摘要
从互信息的观点出发，本文研究了非线性组合函数与其部分变量的组合之间的相关性，探讨了这种相关性对流密码安全性的影响。利用Ｗａｌｓｈ变换，分析了Ｂｅｎｔ函数与其部分变量之间的相关性，给出了一类与Ｂｅｎｔ函数有相同渐近谱特性的布尔函数的结构。
From the viewpoint of mutual information,correlations between a nonlinear combining function and combinations of part of its variables ae studied,and the effect of such correlations on the security of stream ciphers is investigated.Using Walsh transform, correlations between a Bent function and part of its variables are analysed,and a class of Boolean functions is introduced which hold the same asymptotic spectrum properties as Bent functions.
出处
《电子学报》
EI
CAS
CSCD
北大核心
1996年第1期48-52,共5页
Acta Electronica Sinica
关键词
流密码
布尔函数
相关分析
非线性组合函数
Stream cipher,Boolean function,Correlation analysis,Walsh transform,Bent function
