Biometric Cryptosystem Using Online Signatures

  • Alisher Kholmatov
  • Berrin Yanikoglu
Conference paper

DOI: 10.1007/11902140_102

Part of the Lecture Notes in Computer Science book series (LNCS, volume 4263)
Cite this paper as:
Kholmatov A., Yanikoglu B. (2006) Biometric Cryptosystem Using Online Signatures. In: Levi A., Savaş E., Yenigün H., Balcısoy S., Saygın Y. (eds) Computer and Information Sciences – ISCIS 2006. ISCIS 2006. Lecture Notes in Computer Science, vol 4263. Springer, Berlin, Heidelberg

Abstract

Biometric cryptosystems combine cryptography and biometrics to benefit from the strengths of both fields. In such systems, while cryptography provides high and adjustable security levels, biometrics brings in non-repudiation and eliminates the need to remember passwords or to carry tokens etc. In this work, we present a biometric cryptosystem which uses online signatures, based on the fuzzy vault scheme of Jules et al. The fuzzy vault scheme releases a previously stored key when the biometric data presented for verification matches the previously stored template hidden in a vault. The online signature of a person is a behavioral biometric which is widely accepted as the formal way of approving documents, bank transactions, etc. As such, biometric-based key release using online signatures may have many application areas.

We extract minutiae points (trajectory crossings, endings and points of high curvature) from online signatures and use those during the locking & unlocking phases of the vault. We present our preliminary results and demonstrate that high security level (128 bit encryption key length) can be achieved using online signatures.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2006

Authors and Affiliations

  • Alisher Kholmatov
    • 1
  • Berrin Yanikoglu
    • 1
  1. 1.Faculty of Engineering and Natural SciencesSabanci UniversityTurkey

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