借助覆盖向量刻画了代数免疫布尔函数的特征,给出布尔函数代数免疫不大于某确定值的充要条件.该结果可用来研究正规布尔函数的代数免疫,证明了k-正规布尔函数的代数免疫的上界是n—k.
A characterization of the algebraic immune Boolean functions is presented by means of the covering vectors. A sufficient and necessary condition is given that the algebraic immunity of a Boolean function is not more than a fixed value. This result is used to describe a characterization of the algebraic immune of normal Boolean functions. It is also shown that the upper bound of the algebraic immunity of k-normal Boolean functions is n-k.