期刊名称：International Journal of Innovative Research in Computer and Communication Engineering
印刷版ISSN：2320-9798
电子版ISSN：2320-9801
出版年度：2016
卷号：4
期号：4
页码：7529
DOI：10.15680/IJIRCCE.2016.0404241
出版社：S&S Publications
摘要：In personal computing devices that rely on a cloud storage environment for data backup, an imminent ch allenge facing source de - duplication for cloud backup services is the low de - duplication efficiency due to a combination of the resource intensive nature and the limited system resources. Data de - duplication is one of important data compression techniques f or eliminating duplicate copies of repeating data, and has been widely used in cloud storage to reduce the amount of storage space and save bandwidth. To protect the confidentiality of sensitive data while supporting de - duplication, the convergent encrypti on technique has been proposed to encrypt the data before outsourcing. To better protect data security, this paper makes the first attempt to formally address the problem of authorized data de - duplication. Different from traditional de - duplication systems, the differential privileges of users are further considered in duplicate check besides the data itself. We also present several new de - duplication constructions supporting authorized duplicate check in hybrid cloud architecture. Security analysis demonstr ates that our scheme is secure in terms of the definitions specified in the proposed security model. As a proof of concept, we implement a prototype of our proposed authorized duplicate check scheme and conduct tested experiments using our prototype. We sh ow that our proposed authorized duplicate check scheme incurs minimal overhead compared to normal operations
