【摘要】 介绍具有时空约束的角色授权委托模型,在RBDM0和RDM2000的基础上,对授权委托中的角色、权限、操作等要素进行时空化处理,使授权委托具备时空属性,并形式化地描述严格/非严格委托、单/多步委托以及全部/部分委托的授权判断规则,为该模型在实际系统中的实现奠定基础。更多还原

【Abstract】 A Temporarily-Spatially(TS) constrained Role-Based Delegation Model(TS_RBDM) is introduced.On the basis of RBDM0 and RDM2000,role,permission,and operation in delegation are all temporarily-spatially sensitive,which makes delegation have TS attribute,and introduces some formal definition of TS_RBDM including issues of strict/non-strict delegation,one/multiple step delegation,entire/partial delegation,and provides the foundation for applications executing the permission delegation.更多还原