A Theoretical Framework for Constructing Matching Algorithms Secure against Wolf Attack

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概要

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• The security of biometric authentication systems against impersonation attack is usually evaluated by the false accept rate, FAR. The false accept rate FAR is a metric for zero-effort impersonation attack assuming that the attacker attempts to impersonate a user by presenting his own biometric sample to the system. However, when the attacker has some information about algorithms in the biometric authentication system, he might be able to find a "strange" sample (called a wolf) which shows high similarity to many templates and attempt to impersonate a user by presenting a wolf. Une, Otsuka, Imai[22], [23] formulated such a stronger impersonation attack (called it wolf attack), defined a new security metric (called wolf attack probability, WAP), and showed that WAP is extremely higher than FAR in a fingerprint-minutiae matching algorithm proposed by Ratha et al.[19]and in a finger-vein-patterns matching algorithm proposed by Miura et al.[15]. Previously, we constructed secure matching algorithms based on a feature-dependent threshold approach[8] and showed that if the score distribution is perfectly estimated for each input feature data, then the proposed algorithms can lower WAP to a small value almost the same as FAR. In this paper, in addition to reintroducing the results of our previous work[8], we show that the proposed matching algorithm can keep the false reject rate (FRR) low enough without degrading security, if the score distribution is normal for each feature data.

著者

• Otsuka Akira

  National Inst. Advanced Industrial Sci. And Technol. Tokyo Jpn

• Imai Hideki

  Faculty Of Engineering Yokohama National University

• IMAI Hideki

  Faculty of Science and Engineering, Chuo University

• INUMA Manabu

  National Institute of Advanced Industrial Science and Technology (AIST)

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• A Theoretical Framework for Constructing Matching Algorithms Secure against Wolf Attack
• A Theoretical Framework for Constructing Matching Algorithms Secure against Wolf Attack

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