Public Auditing for Encrypted Data with Client-Side Deduplication in Cloud Storage  

作　　者：HE Kai HUANG Chuanhe ZHOU Hao SHI Jiaoli WANG Xiaomao DAN Feng 

机构地区：[1]School of Computer,Wuhan University [2]School of Information Science and Technology,Jiujiang University [3]School of Information Science and Engineering,Wuhan University of Science and Technology

出　　处：《Wuhan University Journal of Natural Sciences》2015年第4期291-298,共8页武汉大学学报（自然科学英文版）

基　　金：Supported by the National Natural Science Foundation of China(61373040,61173137);the Ph.D.Programs Foundation of Ministry of Education of China(20120141110002);the Key Project of Natural Science Foundation of Hubei Province(2010CDA004)

摘　　要：Storage auditing and client-side deduplication techniques have been proposed to assure data integrity and improve storage efficiency, respectively. Recently, a few schemes start to consider these two different aspects together. However, these schemes either only support plaintext data file or have been proved insecure. In this paper, we propose a public auditing scheme for cloud storage systems, in which deduplication of encrypted data and data integrity checking can be achieved within the same framework. The cloud server can correctly check the ownership for new owners and the auditor can correctly check the integrity of deduplicated data. Our scheme supports deduplication of encrypted data by using the method of proxy re-encryption and also achieves deduplication of data tags by aggregating the tags from different owners. The analysis and experiment results show that our scheme is provably secure and efficient.Storage auditing and client-side deduplication techniques have been proposed to assure data integrity and improve storage efficiency, respectively. Recently, a few schemes start to consider these two different aspects together. However, these schemes either only support plaintext data file or have been proved insecure. In this paper, we propose a public auditing scheme for cloud storage systems, in which deduplication of encrypted data and data integrity checking can be achieved within the same framework. The cloud server can correctly check the ownership for new owners and the auditor can correctly check the integrity of deduplicated data. Our scheme supports deduplication of encrypted data by using the method of proxy re-encryption and also achieves deduplication of data tags by aggregating the tags from different owners. The analysis and experiment results show that our scheme is provably secure and efficient.

关 键 词：public auditing data integrity storage deduplication cloud storage 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]