Trust Type Based Semantic Web Services Assessment and Selection

As multiple service providers make themselves available on-line, the trustworthiness of services becomes significant. In Web services environments, services from different providers might have to be combined to establish a complete service. Although the individual service can be trusted, the composed service is not guaranteed against trust. Thus there must be a way to determine the composed service is trusted. This paper presents a trust type model to deduce the trust level of composed services. Then, we present a conceptual framework which enables trust based service discovery and selection. Using the inferred trust type of the composed service as the weight, we can evaluate service candidates and select the best match of them. Finally we describe the experiment results to validate our QoS based service selection.