V 4符合J2EE 1.2基于安全性角色而不是方法组的授权模型。
V4 conforms to the J2EE 1.2 authorization model, which is based on security roles rather than method groups.
安全性是更改的另一个主要方面，它体现在从WebSphere安全性授权模型到基于角色安全性的转变中。
Security is another major area of change with the transition from the WebSphere security authorization model to role-based security.
已有的RBAC模型对于角色的授权是简单的、不全面的，我们提出了对象式以及具有管理功能的角色管理模型。
In this paper we introduce an Object-Oriented and a novel role administrative model of RBAC. In this way, we simplify the administration and implementation of systems.
构建了一个带有时间约束的基于角色的工作流系统授权模型，分析该模型对最小权限和责任分离要求的满足情况。
And a WFMS authorization model based on role control and time constraints is constructed, and how it meets the desires of least privilege and separation of duty is discussed.
本文提出了一种基于角色的授权管理模型和授权管理智能代理系统的实现方法。
This paper proposes an authorized management model based on the role a nd implementation of intelligent authorized management agent system.
授权约束是基于角色的访问控制模型中一个非常重要的部分。
Authorization constraint is an important part in role-based access control models.
基于角色的委托授权模型旨在解决传统授权管理的集中性和复杂性问题，从而满足分布式计算环境的需求。
Role-Based Delegation Model mainly solves the centralization and complexity questions of traditional authorization management, and satisfies the requirement of distributed computing environment.
该文介绍了RBAC与代理机制相结合所带来的授权问题，在定义了角色屏蔽概念的基础上，提出了面向代理机制的角色访问控制模型。
This paper discusses the authorization problem and defines the conception of covered role, presents a proxy mechanism oriented role-based access control (PRBAC) model.
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.
针对工作流系统中用户由于某些原因不能按时完成所分配任务的情况，提出了基于角色层次的任务转授权模型。
To adapt to the situation that a user could not complete the assigned task in time, a role-hierarchy-based task delegation model in workflow is proposed.
该模型能够实现细粒度的动态授权，解决了因决策的固有性导致角色数量过多、授权不灵活的问题。
The model considers the authorization from the point of view of object, and resolves the problems that the roles are too many and the authorization is not flexible caused by the inherence of decision.
分析了以上两种模型存在的问题，为了使访问控制更灵活，提出了一种基于角色和任务的访问控制模型，并给出了模型的形式化定义、授权约束和在校园网格中的应用。
It puts forwards a new access control mode based on role and task to make access control more flexible. The formalized meaning, restriction and application in school grid are also presented.
该模型引入复合属性表达式和复合权限的概念，制定授权约束规则，为用户分配多组角色。
It introduces notions of composite attribute expression and composite permission, defines different multiple role groups and makes a finite set of rules to assign user to roles.
该模型引入复合属性表达式和复合权限的概念，制定授权约束规则，为用户分配多组角色。
It introduces notions of composite attribute expression and composite permission, defines different multiple role groups and makes a finite set of rules to assign user to roles.
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