...this is a problem I thing over since some weeks also. For me it would be nice to have some kind of a "pattern" that is always the same for a given fingerprint. This could be used as a "password" (after some translation into a human readable form) and then be given to PAM after a fingerprint login. This way we could overcome the requirement of giving a password to gnome-keyring (for example) after fingerprint login.
Some vendors like UPEK have solutions (password-safes or drive encryptions) that are unlocked by a fingerprint. I could imagine they need such a pattern derived from a fingerprint as an "unlock-key". So I suspect there must be a way to derive a "constant pattern" from a fingerprint. Wolfgang Ullrich > Jonatan Schijman wrote: > > Thanks Daniel > > I undestand... but... :) > > the data that libs store of the image have some kind of representation... > > right? > > or the lib allways compare image <-> image? > > You are correct that it compares a representation of the image - > basically a set of coordinates. > But these vary (quite significantly) on each scan, so hashing them is > not realistic. Same problem as if you were comparing images. > > NBIS is used for most supported devices, and comes with a lot of > documentation. BOZORTH3 is the matcher. > Other supported devices do matching in hardware instead. > > Daniel > > _______________________________________________ > fprint mailing list > [email protected] > http://lists.reactivated.net/mailman/listinfo/fprint > _______________________________________________ fprint mailing list [email protected] http://lists.reactivated.net/mailman/listinfo/fprint
