授权管理（英语：Privilege Management），是根据ITU-T建议案X.509标准，来管理用户权限的过程。其中最重要的组件，就是根据X.509属性凭证（attribute certificate），来创建的授权管理基础建设（英语：Privilege Management Infrastructure，缩写为 PMI）。授权管理基础建设，根据公开密钥基础建设（PKI）所授权的范围，来给与用户适当的权限。根据属性凭证（attribute certificate，AC）来掌握用户的权限状况。

Privilege Management is the process of managing user authorisations based on the ITU-T Recommendation X.509. The 2001 edition of X.509 specifies most (but not all) of the components of a Privilege Management Infrastructure (PMI), based on X.509 attribute certificates (ACs). Later editions of X.509 (2005 and 2009) have added further components to the PMI, including a delegation service (in 2005 ) and interdomain authorisation (in the 2009 edition ).