TRDM——具有时限的基于角色的转授权模型

TRDM-Temporal Role-Based Delegation Model

当前基于角色的系统的完全依赖于管理者的集中式管理方式 ,不能够满足分布环境下的系统管理的需求 基于角色的转授权模型 (role baseddelegationmodel,RDM )更适于分布式环境的授权管理 ,但当前的几种授权模型都不支持时限 (temporary)和授权宽度 基于时限和授权宽度等方面 ,对RDM 2 0 0 0 (role baseddelegationmodel 2 0 0 0 )模型进行了扩充 ,提出了完备的具有时限的基于角色的转授权模型 (temporalrole baseddelegationmodel,TRDM ) ,并提出了新的基于TRDM的角色授权和角色撤销 (revocation)

It's the system manager with authorization role who handles assignments of users to roles in role-based systems. However,the central management,which fully depends on the manager,isn't suitable for distributed environments. Role-based delegation model (RDM) is more suitable for distributed environments. But current role-based delegation models don't support temporal delegation and delegation width. A temporal role-based delegation model called TRDM is presented,which is an extension of RDM2000 by supporting temporal delegation and delegation width. New mechanisms of role delegation and role revocation are explored,which is based on TRDM.