Improved privacy rotection in authentication by fingerprints

J.A. Groot, de, J.P.M.G. Linnartz

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review


We show the feasibility of implementing a new zero leakage quantization schemeon biometric templates. In particular, we investigate the challenge that a sys-tem designer has to model the feature distributions prior to actually enrollingparticipants. For a Gaussian a priori model, we calculate the capacity and pri-vacy leakage for the commonly used biometric dataset FVC2000 and compare itto other verification schemes. We show that the zero leakage scheme achievesan equal error rate of approximately 3.5% while model mismatch leads to anaverage leakage of less than 0.1 bit per dimension. It outperforms quantizationindex modulation, both in terms of prevention of leakage and equal error rate,and binary quantization in terms of verification errors that can be tolerated.
Original languageEnglish
Title of host publicationProceedings of the 32nd WIC Symposium on Information Theory in the Benelux, May 10-11, 2011, Brussels, Belgium
Place of PublicationEnschede
PublisherWerkgemeenschap voor Informatie- en Communicatietheorie (WIC)
Publication statusPublished - 2011
Event2011 IEEE Information Theory Workshop (ITW 2011) - Paraty, Brazil
Duration: 16 Oct 201120 Oct 2011


Conference2011 IEEE Information Theory Workshop (ITW 2011)
Abbreviated titleITW 2011


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