Privacy-preserving public auditing for shared cloud data supporting group dynamics

Boyang Wang, Hui Li, Ming Li

Research output: Chapter in Book/Report/Conference proceedingConference contribution

74 Scopus citations

Abstract

In the cloud, data is often shared by a group of users. To ensure the long-term correctness of cloud shared data, a third-party public verifier can be introduced to audit data integrity. During the auditing, protecting the privacy of the contributors of shared data from the public auditor is a fundamental issue. However, this makes it challenging to simultaneously support group membership dynamics efficiently, due to the significant amount of computation needed to update the signatures on shared data. In this paper, we propose a novel privacy-preserving public auditing mechanism for shared cloud data. With our proposed mechanism, a public verifier is able to audit the integrity of shared data without retrieving the entire data from the cloud, and also without learning private identity information of the group members. Group dynamics (user join and user revocation) are efficiently handled by outsourcing signature updating operations to the cloud via a secure proxy re-signature scheme. Experimental results show that our mechanism is highly efficient for dynamic groups.

Original languageEnglish (US)
Title of host publication2013 IEEE International Conference on Communications, ICC 2013
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1946-1950
Number of pages5
ISBN (Print)9781467331227
DOIs
StatePublished - 2013
Externally publishedYes
Event2013 IEEE International Conference on Communications, ICC 2013 - Budapest, Hungary
Duration: Jun 9 2013Jun 13 2013

Publication series

NameIEEE International Conference on Communications
ISSN (Print)1550-3607

Conference

Conference2013 IEEE International Conference on Communications, ICC 2013
Country/TerritoryHungary
CityBudapest
Period6/9/136/13/13

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering

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