摘要:云计算技术的快速发展使得云服务模式具备了广阔的应用空间，这种模式使用户具备了过往无法比拟的计算能力和存储空间等优势.在云服务模式下用户的隐私安全问题是其推广和应用中面临的首要问题，如何在计算数据的过程中，既保证数据的隐私性，又保证其可用性，是面临的一大难题，同态加密技术作为解决这一问题的关键手段，是近年来国际国内学界的热点问题.介绍了云计算隐私安全和同态加密研究进展、同态加密算法的分类、安全理论基础、全同态加密方案的实现技术以及同态加密技术在云计算隐私保护中的应用，重点对各类同态加密方案的优缺点进行了介绍和分析，提出了未来的研究方向.



Abstract:Cloud service mode has obtained broad application space with the rapid development of cloud computing technology. Such mode has provided users with incomparable computing power and storage space. However, privacy security of users is a primary problem in the promotion and application of the service mode. How to guarantee both the privacy and availability of data in the process of data computation remains a major challenge, and as a key means to solve this problem, homomorphic encryption technique has been a hot subject in international and domestic academic circles in recent years. In this paper, the privacy security of cloud computing, the research progress of homomorphic encryption and the application of homomorphic encryption technique in privacy protection of cloud computing are introduced. Analysis of advantages and disadvantages of various homomorphic encryption schemes is emphasized, and the future research direction is proposed.



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