一个改进的角色层次化关系模型及其应用

该文针对传统的RBAC模型的不足,提出私有权限、公有权限和特征权限等概念,且提出一般继承、私有化继承、公有化继承和无特征继承等角色继承方式,并基于这些新的概念和方法建立了一个改进的角色层化关系模型。应用实例说明,新模型在描述同样的角色层次关系时角色数量比传统模型要少,因而比传统模型更加简化和直观,特别适合于在大型角色层次关系情况下的应用。

An Improved Role Hierarchy Model and Its Applications

In order to get rid of the weakness in traditional RBAC models,some new conceptions,such as private permissions,public permissions and special permissions are introduced and some new role-role inheriting forms such as normal inheritance,privatizing inheritance,publicizing inheritance and special-without inheritance are defined.Based on the above ideas,an improved role hierarchy model is formulated.The application examples show that the new model is simpler and more compre hensible to describe the same role-role relationships compared with traditional ones and it is more suitable to be used in large-scale role hierarchies.