named set of rules that indicates the applicability of a certificate to a particular community and/or class of application with common security requirements
named set of rules that indicates the applicability of a certificate to a particular community and/or class of application with common security requirements
既指定的一套规则,表示某种证书对某一特定团体的适用性,以及/或者表示具备共同安全要求的使用等级.