中文摘要：

在享受云计算带来的全新体验的同时，基于云计算的数据安全问题成为人们关注的热点，能否解决数据安全问题成为云计算进一步发展的关键。文章讨论云计算的发展状况及其面临的数据安全问题，对云计算中数据的隐私性问题进行了研究，并针对隐私性问题的解决方法开展调查，包括身份认证、数据隔离、数据加密、访问控制以及混合云技术等等，针对每一类数据安全问题分析当前的主流解决方案，重点研究隐私保护方面的解决方案，并提出较为全面完整的隐私保护策略，利用现阶段的理论依据与假设论证阐明了各解决方案的合理性及可操作性。

英文摘要：

The Cloud Computing has brought a more convenient and efficient service for the enterprises by using the enormous resource in the Internet. As we enjoy the new experience of the Cloud Computing, the data security issue based on the Cloud Computing has come into the public sight. To solve the data security problem is the key for a better progress of the Cloud Computing. This article mainly introduces the development and various problems of data security of Cloud Computing. Cloud Computing＇s data privacy issues have been studied, methods for solving privacy issues have been investigated, including authentication, data isolation, data encryption, access control, and hybrid cloud technology, etc. It also talks about the routine solutions of each problem and emphasizes the strategy of the issue of data privacy. The theoretical basis and assumptions illustrate the reasonableness of the solution and operability,