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引入了密码安全的一些新度量指标,讨论了这些指标之间的关系。以此为基础得到布尔函数安全准则的新定义,给出非线性度新的上界,说明了这些上界与一般上界之间的关系。
Introduced some new metrics for password security and discussed the relationship between these metrics. Based on this, a new definition of the safety criterion of Boolean function is obtained, a new upper bound of nonlinearity is given, and the relationship between these upper bounds and general upper bounds is given.