多级安全数据库保密性和数据完整性研究

Research on Confidentiality and Data Integrity in Multilevel Database

保密性、完整性和可用性是多级安全数据库必须具备的三要素,然而完整性和保密性的要求往往不一致,现有的多级安全系统一般采用牺牲数据完整性和可用性的方法来获得较高的保密性。该文通过对传统安全模型进行改造,使之具有较高的保密性、数据完整性和可用性。

Multilevel secure database has three basic properties:confidentiality,integrity and availability,but integrity is always at odds with security.In order to acquire confidentiality,most of current multilevel secure systems have to sacri-fice the integrity and availability.This paper introduces a method for improving the traditional multilevel secure data model and the extended model has more confidentiality without sacrificing the system's data integrity and availability.