Role-Based Trust Management System (RBTM) is an effective way to authorization solution in distributed credential management system, and is a hot field in Computer Security.
基于角色的信任委托管理系统是分布式证书管理系统中一个重要的授权管理解决方案，也是计算机安全领域的研究热点。
By evaluating the value of user attributes in the user credential, a qualified user is assigned to a specific role. This allows access authorization based on user characteristics and qualifications.
通过对用户证书中的属性取值进行评估，把符合条件的用户分配给特定角色，从而达到了根据用户的特征及资历实施访问授权的目的。
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