近年来,Bent函数在密码系统的设计中获得了广泛的应用.Bent函数的一个重要性质是,Bent函数与其变元的线性组合之间具有比较小的相关性.基于这一性质,文献[3]用Bent函数构造流密码中非线性组合生成器的组合函数,有效地解决了非线性组合生成器系统受到线性相关攻击的问题.但是,文献[4]已经注意到,Bent函数不是相关免疫函数(相关免疫函数 In recent years, Bent function has been widely used in the design of cryptosystems. An important property of Bent function is that Bent function has a relatively small correlation with the linear combination of its arguments. Based on this property, ] Bent function is used to construct the combination function of the nonlinear combinatorial generator in the stream cipher, which effectively solves the problem of the nonlinear combinatorial generator system being subjected to linear correlation attack. However, it has been noticed in the literature [4] that Bent function is not related to the immune function (Relevant immune function