Paper 2004/358
Reusable Cryptographic Fuzzy Extractors
Xavier Boyen
Abstract
We show that a number of recent definitions and constructions of fuzzy extractors are not adequate for multiple uses of the same fuzzy secret---a major shortcoming in the case of biometric applications. We propose two particularly stringent security models that specifically address the case of fuzzy secret reuse, respectively from an outsider and an insider perspective, in what we call a chosen perturbation attack. We characterize the conditions that fuzzy extractors need to satisfy to be secure, and present generic constructions from ordinary building blocks. As an illustration, we demonstrate how to use a biometric secret in a remote error tolerant authentication protocol that does not require any storage on the client's side.
Metadata
- Available format(s)
-
PDF
PS
- Category
- Foundations
- Publication info
- Published elsewhere. An extended abstract appears in ACM CCS 2004.
- Keywords
- error tolerant cryptographyidentification protocolsbiometrics
- Contact author(s)
- eprint @ boyen org
- History
- 2004-12-15: revised
- 2004-12-15: received
- See all versions
- Short URL
- https://ia.cr/2004/358
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2004/358,
author = {Xavier Boyen},
title = {Reusable Cryptographic Fuzzy Extractors},
howpublished = {Cryptology {ePrint} Archive, Paper 2004/358},
year = {2004},
url = {https://eprint.iacr.org/2004/358}
}
