應用系統的多樣性導致系統設計與實施策略的多樣化，從而導致了多種訪問控制策略
的存在和系統開發維護的高代價，并且系統之間沒有互操作的安全保障，這些問題嚴重阻礙了大量網絡應用（尤其是電子商務）的發展。本文主要研究權限管理基礎設施的核心，并提出它的一種拓撲結構，然后討論了在此結構中如何建立統一的安全機制，并分析了它對各種應用系統的通用性和可擴充性。
關鍵詞：拓撲結構；AA；屬性證書；顯式；隱式
Research of the Topology Problem of Core Infrastructure in PMI GUI Chao1 GAO Jian_yuan1,2 GE Ping2
1 Dept . of Computer and Electronics Science,Hubei University of Economics, 430205 Wuhan,China
2 School of Computer，Huazhong University of Science & Technology, Wuhan 430074
Abstract:The diversity of application programs makes for the diversity of systems’ designs and implementation policies, so it result in the existence of various access control policies and the high price of applications’ development and maintenance, furthermore, there is no security guarantee between each applications, these problems extremely prevent the development of network applications. This paper mainly studies the core of Privilege Management Infrastructure, and a topology of it will be proposed, after them, we will discuss how to establish the uniform security mechanism and analyze the currency and extension adapted to various applications.
Keywords: topology; AA; Attribute Certificate; explicit; latent