In this paper, firstly is about the importance of information security and researchstatus and trench of information security in both abroad and domestic. Then described some classic information security models such as BLP, Biba, RBAC, McCumber etc.

• 本文首先探讨了信息安全的重要性及目前国内外的现状与发展趋势，然后研究了一些经典的信息安全模型，如：BLP模型、Biba模型、RBAC模型、McCumber模型等，McCumber模型体现了在实现安全目的过程中安全措施选择的重要性。