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Title:
Secure Deduplication of Encrypted Data without Additional Independent Servers
Authors: Jian Liu, N. Asokan, 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.
ePrint: https://eprint.iacr.org/2015/455
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