An Effective Approach to Select Trustable Web Services

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.