Authorization constraint is an important part in role-based access control models.
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。
Then, the paper describes several typical Role Based Access Control models, at the same time analyzes and compares them.
然后，描述了几种具有代表性的基于角色的访问控制模型，并对这几种访问控制模型进行了分析比较。
Synthesizes main models of role - based aceros control and designs a time role - based access control model which is called TRBAC model.
在基于角色访问控制的几种主要模型的基础上，提出了一种基于时间的角色访问控制模型。
This paper introduces the theory of access control model based on role and task, and analyzes task and the shortage of above models.
介绍了基于角色的访问控制模型和基于任务的访问控制模型的原理。
Absrtact: access control is one solution of computer security, which have straight and nature features. Role - Based access control has most important influence among all access control models.
摘要：访问控制是众多计算机安全解决方案中的一种，是最直观最自然的一种方案。
Absrtact: access control is one solution of computer security, which have straight and nature features. Role - Based access control has most important influence among all access control models.
摘要：访问控制是众多计算机安全解决方案中的一种，是最直观最自然的一种方案。
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