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中文摘要：
授权管理是重要前提和基础 forcoordinating 并且资源在开的网络分享。最近，授权基于信任是分享的资源的存取权利根据 theirtrust 关系 indistributed 环境被同意的 widelyused。不过，凭证的地位和到信任的无常的 trustinduces 的链的动态变化关系。就授权的无常和信任上的授权模型 onlybased 的 analyzingdeficiency 而言，我们建议联合信任风险评估 andbuild 模型基于模糊设置理论，并且使用模糊集合 toexpress 关节信任风险的会员等级关系。最后， jointtrust 风险关系的推导原则和限制原则被介绍。授权管理模型基于 jointtrust 风险评估被定义，依从的证明和税的分离被分析。建议 modeldepicts 在校长之间的不仅信任关系，而且授权的安全问题。
英文摘要：
Authorization management is important precondition and foundation for coordinating and resource sharing in open networks. Recently, authorization based on trust is widely used whereby access rights to shared resource are granted on the basis of their trust relation in distributed environment. Nevertheless, dynamic change of the status of credential and chain of trust induces to uncertainty of trust relation. Considering uncertainty of authorization and analyzing deficiency of authorization model only based on trust, we proposes joint trust-risk evaluation and build the model based on fuzzy set theory, and make use of the membership grade of fuzzy set to express joint trust-risk relation. Finally, derivation principle and constraint principle of joint trust-risk relationships are presented. The authorization management model is defined based on joint trust-risk evaluation, proof of compliance and separation of duty are analyzed. The proposed model depicts not only trust relationship between principals, but also security problem of authorization.
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