Continuous keystroke dynamics: A different perspective towards biometric evaluation

  • Authors:
  • Patrick Bours

  • Affiliations:
  • Gjøvik University College, Norwegian Information Security Lab, Norway

  • Venue:
  • Information Security Tech. Report
  • Year:
  • 2012

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Abstract

In this paper we will describe a way to evaluate a biometric continuous keystroke dynamics system. Such a system will continuously monitor the typing behaviour of a user and will determine if the current user is still the genuine one or not, so that the system can be locked if a different user is detected. The main focus of this paper will be the way to evaluate the performance of such a biometric authentication system. The purpose of a performance evaluation for a static and for a continuous biometric authentication system differ greatly. For a static biometric system it is important to know how often a wrong decision is made. On the other hand, the purpose of a performance evaluation for a continuous biometric authentication system is not to see if an impostor is detected, but how fast he is detected. The performance of a continuous keystroke dynamic system will be tested based on this new evaluation method.