Dependency Network-based Trust Management for Context-Aware Web Services

A major challenge for Web services trust management is the continuous changing running environments. In such context environments, Web services have difficulty guaranteeing the quality of service. In this paper, we propose a trust management model for context-aware Web services based on the Dependency Network. The novelty of our trust model lies in leveraging the cyclic dependency relations among the quality of service metrics and context environments. Experiments conducted on a real-life dataset demonstrate the capability of our trust model compared to Bayesian Network-based trust model.