Request Merging Based Cross-User Deduplication for Cloud Storage with Resistance Against Appending Chunks Attack  

作　　者：TANG Xin ZHANG Yi ZHOU Linna LIU Dan HU Bingwei 

机构地区：[1]School of Information Science and Technology,University of International Relations,Beijing 100091,China [2]School of Cyberspace Security,Beijing University of Posts and Telecommunications,Beijing 100876,China

出　　处：《Chinese Journal of Electronics》2021年第2期199-209,共11页电子学报（英文版）

基　　金：Fundamental Research Funds for the Central Universities,University of International Relations(No.3262021T13);Research Funds for NSD Construction,University of International Relations(No.2019GA36);National Natural Science Foundation of China(No.U1536207)。

摘　　要：Cross-user deduplication is an emerging technique to eliminate redundant uploading in cloud storage.Its deterministic response indicating the existence of data creates a side channel to attackers,which makes the privacy in the cloud at risk.Such kind of attack as well as further appending chunks attack,still cannot be well resisted in current solutions,thus is becoming a big obstacle in using this technique.We propose a secure cross-user deduplication,called Request merging based deduplication scheme(RMDS),which takes the lead to consider resistance against appending chunks attack in a lightweight way,let alone side channel attack.We utilize the proposed XOR based chunk-level server-side storage structure together with a request merging strategy to obfuscate attackers in minimized communication overhead.The experiment results show that,with security guaranteed,the proposed scheme is more efficient comparing with the state of the art.

关 键 词：DEDUPLICATION Side channel attack Appending chunks attack Request merging Cloud storage 

分 类 号：TP311.13[自动化与计算机技术—计算机软件与理论]