Proof of ownership for deduplication systems: A secure, scalable, and efficient solution

Roberto Di Pietro, Alessandro Sorniotti

Research output: Contribution to journalArticlepeer-review

32 Scopus citations


Deduplication is a technique used to reduce the amount of storage needed by service providers. It is based on the intuition that several users may want (for different reasons) to store the same content. Hence, storing a single copy of these files would be sufficient. Albeit simple in theory, the implementation of this concept introduces many security risks. In this paper, we address the most severe one: an adversary, possessing only a fraction of the original file, or colluding with a rightful owner who leaks arbitrary portions of it, becomes able to claim possession of the entire file. The paper's contributions are manifold: first, we review the security issues introduced by deduplication, and model related security threats; second, we introduce a novel Proof of Ownership (POW) scheme with all the features of the state-of-the-art solution and only a fraction of its overhead. We also show that the security of the proposed mechanisms relies on information-theoretical rather than computational assumptions, and propose viable optimization techniques that further improve the scheme's performance. Finally, the quality of our proposal is supported by extensive benchmarking.
Original languageEnglish (US)
Pages (from-to)71-82
Number of pages12
JournalComputer Communications
StatePublished - May 15 2016
Externally publishedYes

Bibliographical note

Generated from Scopus record by KAUST IRTS on 2023-09-20

ASJC Scopus subject areas

  • Computer Networks and Communications


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