Ensemble Performance of Biometric Authentication Systems Based on Secret Key Generation

DOI10.1109/TIT.2018.2873132zbMATH Open1431.94126arXiv1707.09108OpenAlexW2895255266WikidataQ129155502 ScholiaQ129155502MaRDI QIDQ5223944

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Publication date: 19 July 2019

Published in: (Search for Journal in Brave)

Abstract: We study the ensemble performance of biometric authentication systems, based on secret key generation, which work as follows. In the enrollment stage, an individual provides a biometric signal that is mapped into a secret key and a helper message, the former being prepared to become available to the system at a later time (for authentication), and the latter is stored in a public database. When an authorized user requests authentication, claiming his/her identity as one of the subscribers, s/he has to provide a biometric signal again, and then the system, which retrieves also the helper message of the claimed subscriber, produces an estimate of the secret key, that is finally compared to the secret key of the claimed user. In case of a match, the authentication request is approved, otherwise, it is rejected.Referring to an ensemble of systems based on Slepian-Wolf binning, we provide a detailed analysis of the false-reject and false-accept probabilities, for a wide class of stochastic decoders. We also comment on the security for the typical code in the ensemble.

Full work available at URL: https://arxiv.org/abs/1707.09108

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