中文摘要：

云存储是存储技术的发展趋势．针对在云端存储的文件数据的完整性遭到破坏时无法确认责任的问题，提出云存储完整性问责方案，在完成每次操作后由用户、云存储提供商和可信第三方交互，生成用于问责审计的不可抵赖的凭单．设计了凭单生成协议和问责审计协议，并对问责方案的有效性和安全性进行了分析．该方案不仅能够在用户数据完整性遭到破坏时确认谁应为此负责，还能对用户和凭单链表的完整性提供保护．

英文摘要：

With the development of Internet technology, cloud storage has become a trend of the future. In the cloud storage network, the security and integrity of data are the major concerns of clients. However, there are few effective approaches to confirm the respon- sibility when the data integrity is damaged. An accountability approach of cloud storage integrity is proposed, in which users, cloud storage providers and the trusted third party interact with each other after each operation, and generate non-repudiation vouchers for accountability audit. The specific protocols of voucher generating and accountability audit are also designed, and the availability and security of the accountability method is analyzed. This method not only can confirm who should be responsible when the integrity of user data is damaged, but also can protect the integrity of user data and voucher linked tables.