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A Security Analysis of Biometric Template Protection Schemes

  • Xuebing Zhou
  • Stephen D. Wolthusen
  • Christoph Busch
  • Arjan Kuijper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 5627)

Abstract

Biometric features provide considerable usability benefits. At the same time, the inability to revoke templates and likelihood of adversaries being able to capture features raise security concerns. Recently, several template protection mechanisms have been proposed, which provide a one-way mapping of templates onto multiple pseudo-identities.

While these proposed schemes make assumptions common for cryptographic algorithms, the entropy of the template data to be protected is considerably lower per bit of key material used than assumed owing to correlations arising from the biometric features.

We review several template protection schemes and existing attacks followed by a correlation analysis for a selected biometric feature set and demonstrate that these correlations leave the stream cipher mechanism employed vulnerable to, among others, known plaintext-type attacks.

Keywords

Biometric encryption biometric template protection correlation attacks security analysis 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2009

Authors and Affiliations

  • Xuebing Zhou
    • 1
  • Stephen D. Wolthusen
    • 2
    • 3
  • Christoph Busch
    • 2
  • Arjan Kuijper
    • 1
  1. 1.Fraunhofer Institute for Computer Graphic Research IGDDarmstadtGermany
  2. 2.Norwegian Information Security LaboratoryGjøvik University CollegeGjøvikNorway
  3. 3.Information Security Group, Department of MathematicsRoyal Holloway, University of LondonEghamUK

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