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Proceedings Paper

On information leakage in fuzzy commitment
Author(s): Tanya Ignatenko; Frans Willems
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Paper Abstract

In 1999 Juels and Wattenberg introduced the fuzzy commitment scheme. Fuzzy commitment is a particular realization of a binary biometric secrecy system with a chosen secret key. Three cases of biometric sources are considered, i.e. memoryless and totally-symmetric biometric sources, memoryless and input-symmetric biometric sources, and memoryless biometric sources. It is shown that fuzzy commitment is only optimal for memoryless totally-symmetric biometric sources and only at the maximum secret-key rate. Moreover, it is demonstrated that for memoryless biometric sources, which are not inputsymmetric, the fuzzy commitment scheme leaks information on both the secret key and the biometric data. Finally, a number of coding techniques are investigated for the case of totally-symmetric memoryless biometric data statistics.

Paper Details

Date Published: 27 January 2010
PDF: 14 pages
Proc. SPIE 7541, Media Forensics and Security II, 75410P (27 January 2010);
Show Author Affiliations
Tanya Ignatenko, Technische Univ. Eindhoven (Netherlands)
Frans Willems, Technische Univ. Eindhoven (Netherlands)

Published in SPIE Proceedings Vol. 7541:
Media Forensics and Security II
Nasir D. Memon; Jana Dittmann; Adnan M. Alattar; Edward J. Delp III, Editor(s)

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