Combining two strategies to optimize biometric decisions against spoofing attacks

Li, W, Poh, N and Zhou, Y (2014) Combining two strategies to optimize biometric decisions against spoofing attacks Proceedings of SPIE - The International Society for Optical Engineering, 9216.

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Abstract

© 2014 SPIE.Spoof attack by replicating biometric traits represents a real threat to an automatic biometric verification/ authentication system. This is because the system, originally designed to distinguish between genuine users from impostors, simply cannot distinguish between a replicated biometric sample (replica) from a live sample. An effective solution is to obtain some measures that can indicate whether or not a biometric trait has been tempered with, e.g., liveness detection measures. These measures are referred to as evidence of spoofing or anti-spoofing measures. In order to make the final accept/rejection decision, a straightforward solution to define two thresholds: one for the anti-spoofing measure, and another for the verification score. We compared two variants of a method that relies on applying two thresholds - one to the verification (matching) score and another to the anti-spoofing measure. Our experiments carried out using a signature database as well as by simulation show that both the brute-force and its probabilistic variant turn out to be optimal under different operating conditions.

Item Type:	Article
Authors :	Name Email ORCID Li, W Poh, N n.poh@surrey.ac.uk Zhou, Y
Date :	1 January 2014
DOI :	10.1117/12.2061785
Depositing User :	Symplectic Elements
Date Deposited :	17 May 2017 13:34
Last Modified :	16 Jan 2019 18:46
URI:	http://epubs.surrey.ac.uk/id/eprint/839697

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