Bloom Filter vs Homomorphic Encryption: Which approach protects the biometric data and satisfies ISO/IEC 24745?

Amina Bassit, Florian Hahn, Chris Zeinstra, Raymond Veldhuis, Andreas Peter

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Abstract

Bloom filter (BF) and homomorphic encryption (HE) are popular modern techniques used to design biometric template protection (BTP) schemes that aim to protect the sensitive biometric information during storage and the comparison process. However, in practice, many BTP schemes based on BF or HE violate at least one of the privacy requirements of the international standard ISO/IEC 24745: irreversibility, unlinkability and confidentiality. In this paper, we investigate the state-of-the-art BTP schemes based on these two approaches and assess their relative strengths and weaknesses with respect to the three requirements of ISO/IEC 24745. The results of our investigation showed that the choice between BF and HE depends on the setting where the BTP scheme will be deployed and the level of trustworthiness of the parties involved in processing the protected template. As a result, HE enhanced by verifiable computation techniques can satisfy the privacy requirements of ISO/IEC 24745 in a trustless setting.

Original languageEnglish
Title of host publicationBIOSIG 2021 - Proceedings of the 20th International Conference of the Biometrics Special Interest Group
Subtitle of host publication15.-17. September 2021 International Digital Conference
EditorsArslan Brömme, Christoph Busch, Naser Damer, Antitza Dantcheva, Marta Gomez-Barrero, Kiran Raja, Christian Rathgeb, Ana F. Sequeira, Andreas Uhl
PublisherIEEE
Number of pages6
ISBN (Electronic)978-3-88579-709-8
ISBN (Print)978-1-6654-2693-0
DOIs
Publication statusPublished - Sep 2021
Event20th International Conference of the Biometrics Special Interest Group, BIOSIG 2021 - Darmstadt (Virtual), Germany
Duration: 15 Sep 202117 Sep 2021
Conference number: 20

Publication series

NameLecture Notes in Informatics (LNI) - Proceedings
PublisherGesellschaft für Informatik
VolumeP-315
ISSN (Print)1617-5468

Conference

Conference20th International Conference of the Biometrics Special Interest Group, BIOSIG 2021
Abbreviated titleBIOSIG 2021
CountryGermany
CityDarmstadt (Virtual)
Period15/09/2117/09/21

Keywords

  • biometric template protection
  • Bloom filter
  • homomorphic encryption
  • ISO/IEC 24745

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