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中文摘要：
云计算应用日益普及，但云计算系统的安全强度始终难以准确评估。文章提出了一种能客观评估云计算系统安全强度的信任模型。该模型使用一种信任值来表征云计算系统的整体安全强度，该信任值由一个涵盖多维安全的参数列表生成。文章所提出的信任模型能够帮助用户有效地选择合适的云服务，也能够帮助云服务提供商发现它们服务的不足之处以及可以改进的地方。实验结果表明，模型对云计算系统安全强度的评估具有很好的完备性与准确性。
英文摘要：
The application of cloud computing is becoming more and more popular, but the security strength of cloud computing system is always dififcult to be accurately evaluated. This paper proposes a trust model which can objectively evaluate the security strength of cloud computing system. The model uses a trust value to describe the overall security strength of the cloud computing system, and the trust value is generated by a list of parameters that cover the multidimensional securities. Trust model can help users to choose the appropriate cloud services effectively, and can help service providers to find their deficiencies. The experimental results show that the trust model has good completeness and accuracy for the evaluation of the security strength of cloud computing system.
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