Trust Evaluation Model for Composite Service Based on Subjective Logic

There is little research on the trust evaluation for composite service in the pervasive computing environment. On the basis of SOA (service-oriented architecture), this paper recommends a model SCTRUST, which introduces subjective logic into the trust evaluation for services. In SCTRUST, a composite service evaluation algorithm (CSEA) is offered to solve the trust evaluation over composite service and is verified by simulated experiments in the end. SCTRUST can give trust computation with the dynamic services composition, providing assurance to protect the consumers´ interest.