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Sensors 2012, 12(5), 5246-5272; doi:10.3390/s120505246
Article

Performance Evaluation of Fusing Protected Fingerprint Minutiae Templates on the Decision Level

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Received: 23 February 2012 / Revised: 11 April 2012 / Accepted: 16 April 2012 / Published: 26 April 2012
(This article belongs to the Special Issue Hand-Based Biometrics Sensors and Systems)

Abstract

In a biometric authentication system using protected templates, a pseudonymous identifier is the part of a protected template that can be directly compared. Each compared pair of pseudonymous identifiers results in a decision testing whether both identifiers are derived from the same biometric characteristic. Compared to an unprotected system, most existing biometric template protection methods cause to a certain extent degradation in biometric performance. Fusion is therefore a promising way to enhance the biometric performance in template-protected biometric systems. Compared to feature level fusion and score level fusion, decision level fusion has not only the least fusion complexity, but also the maximum interoperability across different biometric features, template protection and recognition algorithms, templates formats, and comparison score rules. However, performance improvement via decision level fusion is not obvious. It is influenced by both the dependency and the performance gap among the conducted tests for fusion. We investigate in this paper several fusion scenarios (multi-sample, multi-instance, multi-sensor, multi-algorithm, and their combinations) on the binary decision level, and evaluate their biometric performance and fusion efficiency on a multi-sensor fingerprint database with 71,994 samples.
Keywords: decision level fusion; fingerprint; template protection; pseudonymous identifier; minutiae template; performance evaluation decision level fusion; fingerprint; template protection; pseudonymous identifier; minutiae template; performance evaluation
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Yang, B.; Busch, C.; de Groot, K.; Xu, H.; Veldhuis, R.N.J. Performance Evaluation of Fusing Protected Fingerprint Minutiae Templates on the Decision Level. Sensors 2012, 12, 5246-5272.

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