A Grid Computing system is a geographically distributed system with different domains, sharing resources. Security plays very important role in any internet system, specifically in Grid computing system. Since all the resources are shared in grid computing system, trust relationship is very crucial. Different domains have different policies in rendering their resources. They expect that the resources must be used by adhering to their policies.A security model must be made which shows the

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... r conformity. The model must concentrate on behavior of entities in different domains, in different contexts. The trust model should satisfy the resource providers and the users. There are different trust models suggested by different research scholars. This paper proposes a model which ensures behavior conformity in grid computing.