Combining Biometrics
In highly secure systems, reinforcement of evidence
from multiple independent biometric identifiers offers increasingly irrefutable
proof of the identity of the authorized person.
Multi-modal (e.g., multiple biometrics) systems provably deliver better
performance than any single constituent biometrics
Multiple biometrics can also alleviate several practical problems in
biometrics-based personal identification.
First, although a biometric identifier is supposed to
be universal (each person in the target
population should possess it),
in practice, no biometric identifier is truly universal.
For instance, some people are missing fingers due to accidents.
Second, the relevant biometric identifiers can not
always be sensed or measured by a practical biometric
identification system. For instance, a small fraction of the population
possess fingerprints which are very shallow, extremely dry, or roughened from work.
Consequently, the authentication system can not handle this
fraction of population based on that particular biometric identifier.
Third, some biometrics may not be accepted by certain segments of
the population. For instance, retinal identification is fairly intimidating
to the casual user.
We have integrated fingerprint and voice features in a novel way
to improve the performance of Bio-Barrier
- a biometrics based door access control system currently installed in our
lab (Hawthorne 1S-F54).
Selected publications:
Can Multi-biometrics Improve Performance
L. Hong, A. K. Jain, and S. Pankanti
Proc. 1999 IEEE Workshop on Automatic Identification Advanced Technologies
(WAIAT-99), Morristown NJ, pp. 59-64, October 1999.
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