支持动态操作的多副本数据完整性验证方案

针对云存储环境下外包数据面临的安全隐患,并结合现有云数据完整性验证方案的不足,提出了支持动态操作的多副本数据完整性验证方案。方案考虑了多副本应用场景,并在现有云数据完整性验证方案的基础上以较小的代价实现了文件的多副本验证,并通过引入认证的数据结构-基于等级的Merkle哈希树,实现了文件的可验证动态更新。通过对多副本进行关联,可以实现多个副本的同步更新。安全性分析与实验表明了该方案的安全性与有效性,实现了数据的安全存储与更新,并有效保证了数据多副本的隐私安全。

Multiple-replica data integrity checking protocol with efficient dynamic update in cloud storage

Considering the security risk of data stored in cloud and the deficiency of existing data integrity checking schemes, this paper proposed a multiple-replica remote data integrity checking protocol with efficient data dynamic update in cloud storage. The scheme was suitable for multiple replica scenario, and achieved multiple-replica provable data possession at a small cost on the basis of existing cloud data integrity checking schemes. By introducing authenticated data structure called rank-based MHT, the protocol supported full data dynamic operations. Through replica correlation, multiple replicas could be updated synchronously. Security analysis and experiment results show the security and effectiveness of the proposed protocol, and can guarantee the privacy of multiple replicas at the same time.