Evaluating the credibility of cloud services.

Propose a model to evaluate the credibility of cloud services.Provide some algorithms for malicious ratings detection and dynamic optimization.Perform two experiments to validate our model and algorithms. Display Omitted Cloud computing has received wide attention from both industry and academia since it was proposed in the last century. However, due to the open environment and centralized organizational structure, it is more difficult to build trust relationships between users and cloud services. In this paper, a model is proposed to evaluate the credibility of cloud services based on multi factors. The trust evidence, the scene and time were classified as service credibility impact factors. A simulation on the Netlogo platform was performed and the results showed that the proposed model can effectively reflect the users personal preferences, combine various type of evidences, and control the adverse effects caused by the updating events.