中文摘要：

作为-种所有权与管理权分离的存储服务,云存储方便了用户数据的管理与访问.然而,在云存储服务中,数据上传到云端后,数据持有者就失去了对数据的物理控制.如何确 保云端数据的完整性给云存储提出了重要挑战.现有的数据完整性验证方案大多是基于第三方 来实现的,给予第三方太多权限.如果第三方未进行数据完整性验证,而对外宣称数据完整地 存储于云端,数据持有者将受到欺骗.针对以上问题,文章依据双线性映射的基本思想,提出 了-种云存储数据完整性验证方案.该方案的最大特点是能够加强对第三方审计者的控制,从 而提高数据持有者自主验证的能力,同时还能够减少数据持有者的计算时间量.

英文摘要：

As a kind o f storage service that ownership is separated from administration authority, cloud storage facilitates user data management and access. However,in the cloud storage services,when the data are uploaded to the cloud,the data owners may lose the physical control o f the data. How to ensure the integrity of the cloud data proposes an important challenge to the cloud storage. Existing data integrit}^ verification schemes are based on the third- part}^ verification, which gives the third- part}^ too many authorities. I f the third-party fails to verify the integrity o f the data, and claims that the data are stored in cloud integralty, data owners wil l be deceived. In view of the above problems, this paper proposes a data integrity verification scheme for cloud storage based on the basic idea of bilinear mapping. The most important feature o f the scheme is the ability to strengthen the control on the third party auditors wHch improves the ability of independent verification of data owners. At the same time, it can reduce the computation time of data owners.