### Secure Deduplication of Encrypted Data without Additional Independent Servers

Jian Liu, N. Asokan, and Benny Pinkas

##### Abstract

Encrypting data on client-side before uploading it to a cloud storage is essential for protecting users' privacy. However client-side encryption is at odds with the standard practice of deduplication. Reconciling client-side encryption with cross-user deduplication is an active research topic. We present the first secure cross-user deduplication scheme that supports client-side encryption {\em without requiring any additional independent servers}. Interestingly, the scheme is based on using a PAKE (password authenticated key exchange) protocol. We demonstrate that {\em our scheme provides better security guarantees than previous efforts}. We show both the effectiveness and the efficiency of our scheme, via simulations using realistic datasets and an implementation.

Available format(s)
Publication info
Preprint. MINOR revision.
Keywords
applications
Contact author(s)
jian liu @ aalto fi
History
2016-09-07: last of 7 revisions
See all versions
Short URL
https://ia.cr/2015/455

CC BY

BibTeX

@misc{cryptoeprint:2015/455,
author = {Jian Liu and N. Asokan and Benny Pinkas},
title = {Secure Deduplication of Encrypted Data without Additional Independent Servers},
howpublished = {Cryptology ePrint Archive, Paper 2015/455},
year = {2015},
note = {\url{https://eprint.iacr.org/2015/455}},
url = {https://eprint.iacr.org/2015/455}
}

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