 PERMIS

PERMIS (PrivilEge and Role Management Infrastructure Standards) is a sophisticated policy-based authorization system that implements an enhanced version of the U.S. National Institute of Standards and Technology (NIST) standard Role-Based Access Control (RBAC) model.PERMIS supports the distributed assignment of both roles and attributes to users by multiple distributed attribute authorities, unlike the NIST model which assumes the centralised assignment of roles to users.