Visible to the public Correlated Multi-dimensional Qos Metrics for Trust Evaluation Within Web Services

TitleCorrelated Multi-dimensional Qos Metrics for Trust Evaluation Within Web Services
Publication TypeConference Paper
Year of Publication2014
AuthorsMehdi, Mohamad, Bouguila, Nizar, Bentahar, Jamal
Conference NameProceedings of the 2014 International Conference on Autonomous Agents and Multi-agent Systems
PublisherInternational Foundation for Autonomous Agents and Multiagent Systems
Conference LocationParis, France
ISBN Number978-1-4503-2738-1
Keywordsgeneralized dirichlet, probabilistic models, qos-based trust, reputation

Trust and reputation techniques have offered favorable solutions to the web service selection problem. In distributed systems, service consumers identify pools of service providers that offer similar functionalities. Therefore, the selection task is mostly influenced by the non-functional requirements of the consumers captured by a varied number of QoS metrics. In this paper, we present a QoS-aware trust model that leverages the correlation information among various QoS metrics. We compute the trustworthiness of web services based on probability theory by exploiting two statistical distributions, namely, Dirichlet and generalized Dirichlet, which represent the distributions of the outcomes of multi-dimensional correlated QoS metrics. We employ the Dirichlet and generalized Dirichlet when the QoS metrics are positively or negatively correlated, respectively. Experimental results endorse the advantageous capability of our model in capturing the correlation among QoS metrics and estimating the trustworthiness and reputation of service providers.

Citation KeyMehdi:2014:CMQ:2615731.2616084