机构地区: 西安电子科技大学通信工程学院信息保密研究所
出 处: 《电子学报》 1996年第1期48-52,共5页
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.