关键词: 可信云服务, 第三方信任监管, 云服务选择, 信任评估, 云计算

Abstract: As a kind of new network services relying on cloud computing platform, cloud services have been widely applied in many areas. However, security risks under the outsourcing service mode and fraudulent activity under “payasyougo” mode also raise trust issues on cloud services. Now, the level of cloud services credibility has become the basis on whether the users tend to migrate their data to the clouds. Considering the current cloud services chaos, this paper proposes a security service valuation model of the controllable cloud computing platform based on the third party supervise and twoway trust. In order to provide both credible and available cloud services for the users, this paper also introduces comprehensive estimation in which the users experience preference depends on analytic hierarchy process and fuzzy mathematics, and ensures the security of the whole cloud computing platform. Experiment shows that the model can not only effectively improve the transaction success rate and the overall level of user satisfaction, but also resist some fraudulent activities caused by malicious entities to some extent.

Key words: trusted cloud services, thirdparty trusted regulation, cloud service selection, trust evaluation, cloud computing