Quantitative Trust Management to Support QoS-Aware Service Selection in Service-Oriented Environments

Owing to the black-box nature of services, selecting a trustworthy service that best fits users´ requirements is greatly critical in service-oriented computing. Once a set of services fulfilling users´ functional requirements are founded, one of these services invoked by the users depends mostly on the Quality of Services (QoS), particularly security, trust, and reputation. This paper proposes a trust management model to support service discovery and selection based on QoS. We define a quantitative trust evaluating method for dynamic service discovery and selection. The proposed model makes service consumers get trustworthy services possible. Our mechanism uses consumers´ feedback to describe the trust degree of services and service providers. The service selection using the quantitative measurement rather than consumers´ intuition allows selecting a highly reliable service accomplishing their quality requirements well. Finally, we give experimental results.