求翻译：云计算在给用户带来便利的同时，也为用户数据带来新的安全挑战。其中数据完整性成为用户担心的安全问题之一。本文通过分析现有云存储环境下数据完整性验证方案中只适合对单个数据文件进行完整性验证的不足，提出一种新的改进方案。改进后的方案不仅支持多备份数据的完整性验证，而且支持备份数据在验证过程中的隐私保护。通过对改进方案的安全性，可行性进行详细的分析，说明改进后方案是安全和高效的。是什么意思？

Cloud computing to bring convenience to the user, but also bring new security challenges for the user data. Which data integrity become one of the user's security concerns. By analyzing the data integrity verification program in the existing cloud storage environment is only suitable for a single da

Cloud computing to the user's convenience, it also gives the user data has brought new challenges to the security. Where the data integrity for the user security concerns. Through this analysis of the existing cloud storage, the data integrity validation program, only for a single data file integrit

While cloud computing bring convenience to the users, but also for the user data pose new security challenges. Where the data integrity as one of the users worry about security issues. Data integrity in this article through the analysis of existing cloud storage environment certification programme f