Trust Evaluation Model GTruMod for Grid Environments
Xudong Liu · Jisuanji gongcheng · 2008
The paper proposes a novel decentralized trust evaluation model for grid, called GTruMod. In GTruMod, a formula is proposed toevaluate direct trust by referring to the theory of posteriori probabilities of binary events. Referred to characteristics of the society model about trustrelationship, methods are presented to discount feedbacks, compose recommendations, and evaluate the trust value. In decentralize networkenvironments, based on GTruMod, a practical graph–based search algorithm and some optimization methods are proposed to evaluate trust,furthermore its complexity is analyzed. The comprehensive experimental results prove that the model has ability to prevent the maliciousrecommendation.