【摘要】 介绍了基于标记的多级安全数据库模型,提出了基于多级安全概念的分布式数据库安全机制,利用该机制设计了一种分布式数据库数据访问的安全代理服务器结构。该结构可以在分布式数据库系统中综合运用多级安全数据库、安全标记等多种安全技术,极大地提高了分布式环境下数据库系统的安全性。更多还原

【Abstract】 This paper introduces the model and the security characteristics of database that have tags and multiple security levels. It proposes a security control mechanism for distributed database system based on multilevel security concept. It also designs a security proxy server in distributed database system based on this technology. Several security technologies, such as multiple security levels database, security tags etc, are used in distributed database system. This system can greatly enhance the security of distributed database system.更多还原