Trust-Aware Component Service Selection Algorithm in Service Composition

With trust degree set to be the foundation of component service selection in composite service, the execution and selection of composite services could be carried out more effectively based on the trust degree of service; It is favorable for those component services with higher trust degree to join into the process of service composition, thus, enhances the trustiness of composite service. Through introducing trust concept into service composition, two viewpoints of component service selection in composite service could be distinguished; this paper researches trust-aware component service selection problem based on these two viewpoints, establishes mathematical models of component service selection from these two viewpoints respectively, and then designs selection algorithm based on the ant colony system for viewpoint 2. Experiment results prove that the algorithms for trust-aware component service selection have a good optimizing performance.