New shielding functions to enhance privacy and prevent misuse of biometric templates

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

251 Citations (Scopus)


In biometrics, a human being needs to be identified based on some characteristic physiological parameters. Often this recognition is part of some security system. Secure storage of reference data (i.e., user templates) of individuals is a key concern. It is undesirable that a dishonest verifier can misuse parameters that he obtains before or during a recognition process. We propose a method that allows a verifier to check the authenticity of the prover in a way that the verifier does not learn any information about the biometrics of the prover, unless the prover willingly releases these parameters. To this end, we introduce the concept of a delta-contracting and epsilon-revealing function which executes preprocessing in the biometric authentication scheme. It is believed that this concept can become a building block of a public infrastructure for biometric authentication that nonetheless preserves privacy of the participants.

Original languageEnglish
Title of host publicationAudio- and Video-Based Biometric Person Authentication
Subtitle of host publication4th International Conference, AVBPA 2003 Guildford, UK, June 9–11, 2003
EditorsJ. Kittler, M.S. Nixon
Place of PublicationBerlin
Number of pages10
ISBN (Print)3-540-40302-7
Publication statusPublished - 1 Dec 2003
Externally publishedYes

Publication series

NameLecture Notes in Computer Science
ISSN (Print)0302-9743


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