Research on Multi-level Authorization Mechanism for Virtual Organization in Grid Computing System
网格计算中面向虚拟组织的多级授权机制研究

It is a challenging work to implement authorization service for Virtual Organization in Grid Computing Sys- tem because of the dynamic and distributed nature of Virtual Organication. After analyzing the requirement of autho- rization service and the existing mechanisms for implementing authorization services in Grid Computing Systems, the paper proposes an efficient multi-level architecture named MLA for implementing authorization in Grid Computing Systems. With the use of threshold closure mechanism, the proposed architecture has the scalability and the strong power to express authorization policy, hence can provide flexible and efficient approach to implement authorization service in GCS.