摘要
提出了一个安全数据库访问控制模型,包括一个多层关系模型和一个用以增强自主访问控制能力的元素级粒度的授权。在多层关系模型中,通过给出新的数据语义扩展了sandhu的MLR模型,改进了数据借用操作使之支持了传递借用和多值借用。另外,对元素级粒度的授权的支持,增强了系统对用户权限的管理能力。
In this paper, we proposed a formal security database system access model including a multilevel relation model and a elementlevel authorization. We extended sandhu＇s MLR model by giving a new explanation of how the database represents the real world. Under new semantic model, the data-borrow operation was strengthened. Further more,with the support of element-level authorization ,user privilege management of database system could be more reasonable.
出处
《计算机应用与软件》
CSCD
北大核心
2007年第2期65-68,共4页
Computer Applications and Software
