Integrated Trust Evaluation Model in Grid Environment
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摘要: 为解决网格环境的动态性和不确定性带来的安全问题,提出了网格环境中节点之间信任关系综合评估模型.在该模型中,用模糊逻辑描述信任关系,按照用户的关心程度对评估内容的每种属性赋予不同的权值,并综合考虑了用户以往与某节点的交往情况以及该节点的声望.在声望的计算中,根据推荐人的可靠性确定推荐因子,以避免通过推荐实施的欺骗.用算例验证了模型的有效性.Abstract: To solve the security threaten due to in grid environment its instability and uncertainty,an integrated trust evaluation model was proposed to evaluate trust among grid nodes.In the model,a user describes trust with fuzzy logic,assigns weights to different attributes of a subject according to his concern degree,and considers historic communication record between him and concerned nodes as well as reputations of the nodes.Reputation of a node is dependent on a recommend coefficient that is determined according to the reliability of the recommender to avoid cheat from recommendation.An evaluation example was presented to show effectiveness of the model.
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Key words:
- grid /
- security /
- fuzzy logic /
- trust /
- model
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