Privacy protected biometric templates: acoustic ear identification

P.T. Tuyls, E.A. Verbitskiy, T. Ignatenko, D.W.E. Schobben, T.H.M. Akkermans

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

26 Citations (Scopus)


Unique Biometric Identifiers offer a very convenient way for human identification and authentication. In contrast to passwords they have hence the advantage that they can not be forgotten or lost. In order to set-up a biometric identification/authentication system, reference data have to be stored in a central database. As biometric identifiers are unique for a human being, the derived templates comprise unique, sensitive and therefore private information about a person. This is why many people are reluctant to accept a system based on biometric identification. Consequently, the stored templates have to be handled with care and protected against misuse [1, 2, 3, 4, 5, 6]. It is clear that techniques from cryptography can be used to achieve privacy. However, as biometric data are noisy, and cryptographic functions are by construction very sensitive to small changes in their input, and hence one can not apply those crypto techniques straightforwardly. In this paper we show the feasibility of the techniques developed in [5], [6] by applying them to experimental biometric data. As biometric identifier we have choosen the shape of the inner ear-canal, which is obtained by measuring the headphone-to-ear-canal Transfer Functions (HpTFs) which are known to be person dependent [7].
Original languageEnglish
Title of host publicationDefense and security Symposium
EditorsAnil K. Jain, Nalini K. Ratha
Place of PublicationBellingham
Publication statusPublished - 2004
EventDefense and Security Symposium, Orlando, FL, USA -
Duration: 12 Apr 200413 Apr 2004

Publication series

NameProceedings of SPIE


ConferenceDefense and Security Symposium, Orlando, FL, USA
OtherDefense and Security Symposium, Orlando, FL, USA


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