Bi-directional and concurrent proof of ownership for stronger storage services with de-duplication  

作　　者：Taek-Young YOUN Ku-Young CHANG 

机构地区：[1]Electronics and Telecommunications Research Institute,Daejeon 34129,Korea

出　　处：《Science China(Information Sciences)》2018年第3期80-90,共11页中国科学（信息科学）（英文版）

基　　金：supported by Electronics and Telecommunications Research Institute(ETRI)grant funded by the Korean government(17ZH1700,Development of Storage and Search Technologies over Encrypted Database)

摘　　要：In storage service, data de-duplication is a specialized technique for eliminating duplicate copies of repeating data in storage. Especially, client-side de-duplication has more merits than server-side de- duplication since they can improve both the space efficiency and the communication bandwidth. For secure client-side de-duplication, we need a way to prove the ownership of a file to be stored. In the upload step, the server should verify the ownership of a client to give the right of the file without uploading it. On the contrary, the client also want to verify the retrievability for the file since he will delete it from his storage after protocol execution. Existing proof of ownership techniques have been designed for server＇s need. In this paper, we first point out that we need the second property in client＇s view point, and give a very simple and practical solution which can support the server and the client to prove that they have the same file. YVe first describe a generic strategy which can help us to construction a bi-directional and concurrent proof of ownership technique from an ordinary proof of ownership technique, and then give an efficient hash-based scheme with security proof in the random oracle model.In storage service, data de-duplication is a specialized technique for eliminating duplicate copies of repeating data in storage. Especially, client-side de-duplication has more merits than server-side de- duplication since they can improve both the space efficiency and the communication bandwidth. For secure client-side de-duplication, we need a way to prove the ownership of a file to be stored. In the upload step, the server should verify the ownership of a client to give the right of the file without uploading it. On the contrary, the client also want to verify the retrievability for the file since he will delete it from his storage after protocol execution. Existing proof of ownership techniques have been designed for server＇s need. In this paper, we first point out that we need the second property in client＇s view point, and give a very simple and practical solution which can support the server and the client to prove that they have the same file. YVe first describe a generic strategy which can help us to construction a bi-directional and concurrent proof of ownership technique from an ordinary proof of ownership technique, and then give an efficient hash-based scheme with security proof in the random oracle model.

关 键 词：cloud storage secure de-duplication data out-source proof of ownership bi-directional andconcurrent proof 

分 类 号：TN915.0[电子电信—通信与信息系统]