A novel trust measurement system for cloud-based marketplace

Cloud Computing is an enormously growing phenomenon in the present days enabling IT related services to run in a more dynamic and scalable way than the previous days and cloud marketplace is becoming more competitive with the entrance of new cloud service providers (CSP) offering similar functionalities. The basic obstacles in the way of success of cloud marketplace are the numerous shortcomings in reliable monitoring and identifying reliable cloud service provider based on consumers´ preferred services. In this paper, a multi-faceted Entrusted Trust Management (ETM) system architecture is introduced that can support the customers in reliably choosing the trustworthy cloud service provider (CSP) as well as properly weight the information sources that provide feedbacks about the quality of services (QoS) of the CSPs. This ETM system works on several issues to measure the trust value of the providers on specific domain and overall trust value. Firstly, measurement of the trust value of the specific domain of provider on the basis of certainty and uncertainty. Secondly, measurement of overall trust value of the provider from these domain specific trust values. Thirdly, measurement of “Degree of Conflict” between the rating/feedback of consumers and experts. And finally, measurement of trustworthiness of the information sources which provide the rating of the provider on the basis of the SLA between the provider and the consumer. At last, our proposed system is experimented using real datasets.