Data sharing on the cloud: A scalable proxy-based protocol for privacy-preserving queries

Maryam Sepehri, Stelvio Cimato, Ernesto Damiani, Chan Yeob Yeuny

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

21 Scopus citations

Abstract

Outsourcing data on the cloud poses many challenges related to data owners and users privacy, specially when some data processing capabilities are delegated to the cloud infrastructure. In this paper we address the problem of executing privacy-preserving equality queries in a scenario where multiple data owners outsource their databases to an untrusted cloud service provider, accepting encrypted queries coming from authorized users. We propose a highly scalable proxy re-encryption scheme so that (i) the cloud service provider can return only the encrypted data that satisfies user's query without decrypting it, and (ii) the encrypted results can be decrypted using the user's key. We analyze the computation efficiency and the security of the scheme against proxy under the standard Diffie-Hellman assumption, reporting also some experimental results, which show encouraging speed up in comparison with previously proposed similar schemes.

Original languageBritish English
Title of host publicationProceedings - 14th IEEE International Conference on Trust, Security and Privacy in Computing and Communications, TrustCom 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1357-1362
Number of pages6
ISBN (Electronic)9781467379519
DOIs
StatePublished - 2 Dec 2015
Event14th IEEE International Conference on Trust, Security and Privacy in Computing and Communications, TrustCom 2015 - Helsinki, Finland
Duration: 20 Aug 201522 Aug 2015

Publication series

NameProceedings - 14th IEEE International Conference on Trust, Security and Privacy in Computing and Communications, TrustCom 2015
Volume1

Conference

Conference14th IEEE International Conference on Trust, Security and Privacy in Computing and Communications, TrustCom 2015
Country/TerritoryFinland
CityHelsinki
Period20/08/1522/08/15

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