A Security Model Based on Database System

This paper proposed a formalize method of mandatory access control (MAC) model for multilevel secure DBMS and discussed the problems of labeling object in tuples, and security label, and covert channels. Mandatory access control (MAC) model requires that all users and resources are classified and assigned a security label, which is a combination of a hierarchical security level and non-hierarchical security categories. Because mandatory access control (MAC) plays an important role in highly secured database system. The model for an independent copyright database management system LogicSQL is implemented. The paper designed at least the B1 security model for LogicSQL database.