The Design And Implementation Of Database Multilevel Security Model And Security Middleware

The development of the database system is able to offer more service of perfecting convenient information and data, and to realize the sharing of the information of the data for users. But as the development of network, the sharing of information has brought the security problems for the database system too. With constant development and broad using of database system, database security has become one important subject for research.In this thesis, we emphasis on study of the database security architecture and security database model . We also have an embedded discussion about the design and implementing of security database. We provide a designing blue print to realize database security using database security middleware. The main content are as the followings:The temporal logic is introduced to the database security model and a new database multilevel security model about temporal is proposed in this paper based on the research of the traditional information security models.The conception of security level and the security rules are described in details.We put the theory of authority propagating on implementing of database security model. At the same time we achieve database multilevel security model using security relationship with the theory of authority propagating.We also discuss security middleware theory and design to actualize security database and build a security database middleware prototype system to realize the database security theory and models.