Trust Models For Open Grid Network

To meet the increasing requirement for resource sharing and work collaboration between dynamic virtual organizations, grid techniques have developed rapidly in recent years and an open grid market is expected to come into use in near future. Considering the severe competition and the open nature of the grid market, anonymity mechanism of grid entities and quality insurance of grid services are two essential issues during the development of an open grid service market.In this thesis, I focus on two kinds of trust relationship in grid computing environment, i.e., the trust relationship among virtual organizations and the trust among entities inside a virtual organization. To protect the privacy of the individual entities inside a virtual organization, I extend the existing anonymity protocols and propose a multi-hop forward anonymity protocol. To evaluate the trustworthiness of a virtual organization, I propose an innovative grid trust model based on multiple attributes decision making (MADM) theory. I implemented this MADM based model using Java and compared its performance with that of Weighted Feedback trust model and eBay trust model. Simulation results show that MADM based model is able to reflect the trustworthiness of a virtual organization more accurately than the other two models.