这种模式的协同环境中，需要两种Agent:模型访问代理(Model Access Agent，MAA)和协同控制代理(Collaboration Control Agent，CCA)，每个设计用户的计算...
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一个主要的原因是传统访问控制模型将进程作为用户的代理赋予其用户的全部权限，从而导致用户权力被滥用。
An important reason is that the classic access control model regards the process as an agent of user and grants it all the user's rights, which results in abusing of the authorized user's rights.
研究了相关的技术基础，如SNMP协议，HTTP协议，代理服务技术以及基于角色访问的控制模型；
Some techniques such as SNMP, HTTP, proxy's basic theory and role-based access control are introduced.
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.
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