给出了一类利用Bent函数直接加上其函数空间的一个子集E的示性函数构造高非线性平衡布尔函数的方法,讨论了可使上述方法所构造布尔函数密码学性质较为优良的子集E的2种具体的选取方法及E的存在性。
In this paper,a kind of method to construct balanced boolean functions with high nonlinearity is given by adding the Bent function to the indicator function of its subset E.After that,In order to obtain boolean functions with more significant cryptography profiles,The paper psesents two kinds of good ways to select the subset E,and discuses the existence of E.