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On the basis of analyzing authentication mechanism which is broadly adopted today，we integrated the needs of gridS development and researched GSI and KX.509 in different grid environment.Drawing the proxy idea of KX.509，we built a grid authentication model in the Globus environment，the model adopt web-login module and it provided three main functions for the campus grid users：transparent creating certificate，enable users using certificate easily.and managing certificate safety.In the process of registration and authentication，web-login module could create digital proxy certificate for users automatically,and users neednt have their own digital certificate.