提出了一种基于委托逻辑的访问控制模型——dlbac，将凭证、RBAC元素和访问策略转化为统一的委托逻辑规则。
The paper puts forward a delegation logic based access control model (DLBAC). It translates the credentials, RBAC elements and access policies into unified delegation logic rules.
基于规则和角色的访问控制模型RB-RBAC在RBAC模型的基础上引入了用户属性和授权规则，使得用户-角色分配能够自动完成。
Rule-based RBAC (RB-RBAC) modifies RBAC and introduces user attributes and rules to automatically assign users to roles. But there are still shortcomings in RB-RBAC.
基于规则和角色的访问控制模型RB-RBAC在RBAC模型的基础上引入了用户属性和授权规则，使得用户-角色分配能够自动完成。
Rule-based RBAC (RB-RBAC) modifies RBAC and introduces user attributes and rules to automatically assign users to roles. But there are still shortcomings in RB-RBAC.
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