Abstract
In 1999 Juels and Wattenberg introduced the fuzzy commitment scheme. Fuzzy
commitment is a particular realization of a binary biometric secrecy system with
a chosen secret key. Three cases of biometric sources are considered, i.e. memory-
less and totally-symmetric biometric sources, memoryless and input-symmetric
biometric sources, and memoryless biometric sources. It is shown that fuzzy
commitment is only optimal for memoryless totally-symmetric biometric sources
and only at the maximum secret-key rate. Moreover, it is demonstrated that for
memoryless biometric sources, which are not input-symmetric, the fuzzy com-
mitment scheme leaks information on both the secret key and the biometric data.
| Original language | English |
|---|---|
| Title of host publication | Proceedings of the 30th Symposium on Information Theory in the Benelux, May 28-29, 2009, Eindhoven, The Netherlands |
| Editors | Tj. Tjalkens, F.M.J. Willems |
| Place of Publication | Eindhoven |
| Publisher | Technische Universiteit Eindhoven |
| Pages | 185-192 |
| ISBN (Print) | 978-90-386-1852-4 |
| Publication status | Published - 2009 |