An improved role hierarchy model is introduced against the drawback of RBAC96; some new concepts such as public permission, private permission and scope of inheritance are presented in the model.
提出了一种改进的角色层次模型用于改善RBAC96，并提出一些新的概念，比如：公有权限、私有权限和继承范围。
In this paper, we introduce the role-based access control model, analyse the role hierarchy model and the problem of private permissions in RBAC96, and point out the disadvantage of Sandhu s solution.
针对著名的 RBAC96模型的不足之处 ，结合私有权限、部门权限和权限属性变化等问题 ，对角色权限及角色层次关系进行了分析 ，提出了一个改进的角色层次化关系模型 。
Enterprise model management scenarios are broken down into a hierarchy with three levels, each of which is governed by a specific role within the enterprise.
企业模型管理分解为有三个层次的阶层，它们中的每一个是由企业内的特定角色管理的。
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