Abstract: Control plays an important role in some fields, which is one of the necessary parts of information system to manage and control the safety of all kinds of resource. In this paper,we proposed some popular access control models,explained the characteristics and realization method of every access control model, analyzed and compared their advantages and shortcomings. Also, we introduced a standard access control policy language, XACML, with stronger semantic.Furthermore, we pointed out some contents being researched currently.

Key words: Acccss control , DAC, RBAC, ABAC