A study on Trust Models in Cloud Computing

Information Security is an aggregation of people effort, processes and technology to help organizations at providing confidentiality, integrity and availability in their information assets. Nowadays, almost all technology services are heavily dependent on cloud computing under their various forms of service models. We realize there are weaknesses in cloud services concerning issues of performance, reliability, security, and privacy, among other issues. Cloud services consumers do not have enough information on these issues neither on compliance with laws and regulations. In this paper, we present a comprehensive mapping of works that deal with cloud trust aspects from user perspective. We aim at identifying how users or consumers of Cloud services measure trust on cloud computing services. Our main contributions are: (i) an updated study on the state of the art of cloud trust models; (ii) a taxonomy of characteristics and contributions to cloud trust; (iii) a discussion on works which present hard problems of research on cloud trust models and gaps of contributions in the literature.