论文部分内容阅读
To protect against algebraic attacks,a high algebraic immunity is now an important criterion for Boolean functions used in stream ciphers.In this paper,a new method based on a univariate polynomial representation of Boolean functions is proposed.The proposed method is used to construct Boolean functions with an odd number of variables and with maximum algebraic immunity.We also discuss the nonlinearity of the constructed functions.Moreover,a lower bound is determined for the number of Boolean functions with maximum algebraic immunity.