An Effective Approach to Select Trustable Web Services

Abstract

The authenticity of advertised QoS for Web services is of particular relevance during service discovery and selection. Reputation of a service is often used as a measure of its trustworthiness. Currently, reputation is usually computed from the users' feedbacks and represents a snapshot for the interactions in a past time slot. However, in an open environment, reputation is a volatile property, which is subject to change. A more effective measure is needed for the users to pick up trustable Web services. In this paper, we propose a novel measure to evaluate the authenticity of Web services based on reputation. To enhance the traditional service trustworthiness measurement that depends mainly on services' current reputation, our measure incorporates historical reputation data of services and service providers' reputation into the evaluation of users' trust in services. Experiments are presented to evaluate the effectiveness of our approach.