数据库多级安全模型的研究

Research of Multilevel Security Model in Database

实现了强制访问控制的模型被称为多级安全模型。首先介绍了两种常用强制访问控制模型:Bell-LaPadula模型和Bibe模型。重点讨论了Bell-LaPadula模型,分析了该模型“下读上写”的安全访问策略,并针对其局限性,从数据库的保密性、完整性和可用性三方面对其进行了扩展和改进。

The model that implement mandatory access control is called multilevel security（MLS） model. This paper first introduced two commonly used mandatory access control model： Bell-LaPadula model and Bibe model. Mainly discussed Bell-LaPadula model, analyzed the model＇s security access policy： ＂No Read Up, No Write Down＂. And aimed at it＇s limitations, extended and improved the model from database＇s confidentiality ,integrity and availability.