International Association for Cryptologic Research

International Association
for Cryptologic Research


Paper: Externalized Fingerprint Matching

Claude Barral
Jean-S├ębastien Coron
David Naccache
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Abstract: The 9/11 tragedy triggered an increased interest in biometric passports. According to several sources \cite{sp2}, the electronic ID market is expected to increase by more than 50\% {\sl per annum} over the three coming years, excluding China. \smallskip To cost-effectively address this foreseen explosion, a very inexpensive memory card (phonecard-like card) capable of performing fingerprint matching is paramount.\smallskip This paper presents such a solution. The proposed protocol is based on the following idea: the card stores the user's fingerprint information to which random minutiae were added at enrolment time (we denote this scrambled template by $t$). The card also stores a binary string $w$ encoding which of the minutiae in $t$ actually belong to the holder. When an identification session starts, the terminal reads $t$ from the card and, based upon the incoming scanner data, determines which of the minutiae in $t$ are genuine. The terminal forms a candidate $w'$ and sends it to the card. All the card needs to do is test that the Hamming weight of $w \oplus w'$ is smaller than a security threshold $d$. \smallskip It follows that the card only needs to embark passive data storage capabilities, one exclusive-or gate, a shift register, a counter and a comparator (less than 40 logical gates).
  title={Externalized Fingerprint Matching},
  booktitle={IACR Eprint archive},
  keywords={applications / fingerprint smart-card},
  note={ 12447 received 30 Jan 2004},
  author={Claude Barral and Jean-S├ębastien Coron and David Naccache},