一种改进的细粒度云存储安全去重方案

An Improved Security De-Duplication Scheme for Fine-Grained Cloud Storage

数据数量的不断增长使得越来越多的数据存储在云环境下,数据去重技术在云环境下的应用也越来越广泛,通过存储唯一文件副本减少存储空间,降低网络通信开销。为了实现安全的数据去重,MLE方案及其很多基于MLE方案的改进方案被提出,然而,原始MLE方案中的固定长度分块技术随着数据量的不断增大不在适用,而且很多方案并没有将数据的所有权证明以及所有权变更问题进行研究,随着用户对个人隐私的注重,这种没有所有权管理的方案显然是不行的。提出一种基于内容的可变长度分块技术,安全高效的所有权管理数据去重方案,通过引进双数组Tire树,对数据的所有权问题进行管理的同时,实现数据的安全去重。分析和实验结果表明,该方案可以更细粒度地对重复数据进行去重,对数据的所有权进行管理。

The continuous increase in the amount of data has resulted in more and more data being stored in the cloud environment,and the application of data deduplication technology in the cloud environment has become more and more extensive.The storage of unique file copies reduces storage space and reduces network communication overhead.In order to achieve safe data deduplication,the MLE scheme and many improvements based on the MLE scheme have been proposed.However,the fixed-length block technology in the original MLE scheme is not applicable as the amount of data continues to increase,and many schemes do not The data ownership certificate and ownership change issues are studied.As users pay more attention to personal privacy,this scheme without ownership management is obviously not feasible.This paper proposes a content-based variable-length block technology,a safe and efficient data deduplication scheme for ownership management.By introducing a double array Tire tree,the data ownership problem is managed while achieving the safe deduplication of data.Analysis and experimental results show that this solution can de-duplicate data at a fin⁃er granularity and manage data ownership.