Bayesian hill-climbing attack and its application to signature verification

  • Authors:
  • Javier Galbally;Julian Fierrez;Javier Ortega-Garcia

  • Affiliations:
  • EPS, Universidad Autonoma de Madrid, Madrid, Spain;EPS, Universidad Autonoma de Madrid, Madrid, Spain;EPS, Universidad Autonoma de Madrid, Madrid, Spain

  • Venue:
  • ICB'07 Proceedings of the 2007 international conference on Advances in Biometrics
  • Year:
  • 2007

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Abstract

A general hill-climbing attack algorithm based on Bayesian adaption is presented. The approach uses the scores provided by the matcher to adapt a global distribution computed from a development set of users, to the local specificities of the client being attacked. The proposed attack is evaluated on a competitive feature-based signature verification system over the 330 users of the MCYT database. The results show a very high efficiency of the hill-climbing algorithm, which successfully bypassed the system for over 95% of the attacks.