Security issues of cloud computing platform have been paid more and more attention to, and security issues of shared services should be improved in order to promote the development of cloud computing effectively. First, the article analyzes shared service model of cloud computing and security risks framework. Second, the article discusses the countermeasures of new security risks or traditional risks magnified in the cloud environment simply. This article has certain significance on solving security risks of cloud sharing service and in-depth study in the future.% 云计算平台的安全性问题越来越受到广泛的关注,同时也只有完善云计算共享服务的安全性问题,才能有效促进其发展进程。首先对云计算共享服务模式和目前存在的云服务安全风险架构进行分析;然后对云服务面临的新的或传统风险中被忽略而在云计算中被放大的安全风险及对策进行初步探讨。
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