多云存储下非同频可证明数据迁移方法

Not-same frequency provable data transfer method under multi-cloud storage

很多用户在多个云上存有大量文件,有时在云间要进行大量文件的迁移操作,但因云服务商或黑客攻击等原因导致的文件损坏时有发生,所以云存储用户在存储和迁移过程中必须进行数据完整性认证,且认证开销要尽可能低。目前已有的数据迁移方法在迁移大量文件时认证时间开销较大。针对此问题,提出非同频可证明数据迁移方法,它是根据云上文件损坏的时间特征,在不同时间段按不同频度进行认证。安全性分析和实验结果表明,该方法能显著降低文件云间迁移时的认证时间开销,是一种有效的可证明数据迁移方法。

Many users store a large number of files on multiple clouds,and sometimes some users transport a large number of files from one cloud to another,but corruption of files due to cloud services or hacker attacks occur frequently.Therefore,cloud users must perform data integrity verification during the transfer process.Moreover,the verification overhead should be as low as possible.Existing methods of data transfer are time-consuming when a large numbers of files transfer.Aiming at this problem,this paper proposed the not-same frequency provable data transfer method.According to the time characteristics of file corruption on the cloud,cloud users carried out verification in different frequencies at different time periods.The security analysis and experimental results show that the proposed method can significantly decrease error detection latency of files transfer between clouds,and it’s an effective prove data transfer method.