Service Rank Based on Trust Model in Grid Environment
Shu Zhang · 2007
Building a share resource cooperation relation in grid community is the fundamental and challenging research topic because of localize autonomous, dynamical, stochastic, and absence of an effective security mechanism, it lies at the core of interactions between the consumer and provider that have to operate in such uncertain and constantly changing environments. This paper defines the service trust model, and propose a good cooperation model based service trust model. In order to measure the relative available of services, we propose ServiceRank, a method for computing a ranking for every services based trust model. In order to building high available problem solving environment, we need set up a safe and effective mechanism. The trust model consists of two parts: reputation evaluation and risk evaluation. Reputation is the accumulative assessment of the long-term behavior, while the risk evaluation is the opinion of the short-term behavior. This paper contributes to first modeling the risk as the opinion of short-term trustworthiness and combining with traditional reputation evaluation to derive the trustworthiness in this field.