The thesis focus on the NIST industry standard of RBAC: ANSI/INCITS 359-2004, approved on Feb. 19, 2004.GFAC and FLASK are general access control frameworks used widely, but none of them is accepted by the mainstream operating system.

• 论文主要介绍的是2004年2月19日通过的RBAC工业标准：ANSI/INCITS 359-2004。