Cryptology ePrint Archive: Report 2009/030
An efficient fuzzy extractor for limited noise
B. Skoric and P. Tuyls
Abstract: A fuzzy extractor is a security primitive that allows
for reproducible extraction of an almost uniform key
from a noisy non-uniform source. We analyze a fuzzy
extractor scheme that uses universal hash functions
for both information reconciliation and privacy
amplification. This is a useful scheme when the number
of error patterns likely to occur is limited,
regardless of the error probabilities.
We derive a sharp bound on the uniformity of the
extracted key, making use of the concatenation property
of universal hash functions and a recent tight
formulation of the leftover hash lemma.
Category / Keywords: fuzzy extractor
Date: received 13 Jan 2009, last revised 21 Jul 2009
Contact author: b skoric at tue nl
Available formats: PDF | BibTeX Citation
Note: The discussion of robustness has been updated.
Version: 20090721:093141 (All versions of this report)
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