Research and implementation of grid security mode based on identity authentication

Grid is an open distributed system environment, whose purpose is to provide for sharing the resources between virtual organizations with distributed, heterogeneous, dynamic characteristics, so, grid has been paid much respect in the world. Security is one of the key factors in grid environment, and it is a basic guarantee to realize the goal in grid. Grid security means legal users may legally employ grid resources, and the information of users and resources can be safely transferred in grid. The safe requests in all open system environment can be used in grid environment, and in addition, safety realization in grid environment faces the new challenge due to a special goal. Open Grid Service Architecture (OGSA) is a kind of grid structure standard recommended by Global Grid Forum (GGF), while OGSA combines existing grid standards with standards of Web services, and it is a typical representation of the third generation grid because of OGSA's service centered feature. OGSA, the basic criterion of definition grid services, offers consistent resource visiting interface based on the abstract generalization of resources through the concept of grid services and shielding resource heterogeneity, and it is a standard protocol and infrastructure of OGSA. Research identifies of grid security at home and abroad is thoroughly analyzed, and its advantages and disadvantages are summarized. Finally, the security model and the authentication, authorization framework of open grid environment are presented; the security protocols and infrastructures of the OGSA grid service are discussed.