Hi, the thing is, that I don't know much about the encryption nor about the protocol itself. I was just lucky and I figured out, how to activate the device, so it is transmitting the fingerprint in (almost) plain PGM stripes. I am even not sure, if the original driver is transmitting the fingerprint encrypted (I just can't recognize the data format).
It would be nice, if we can use all functions of the device, including the encryption. But right now, all I want to do is to make the device working instead of being dead piece of plastic. I figured the way, how to use PGM mode just by experimenting with the device (it might be so, that the device is not encrypted until it is activated - so my credit might not be so great). I don't think, that the encryption is here for obfuscating the protocol, but it is meant to secure the transmitted data - it might not be difficult to activate unencrypted mode also for other devices, the encryption protocol also might be straightforward (i.e. computer sends it's public key, the device answers with encrypted and signed fingerprint). Dne Wed, 30 Mar 2011 16:25:15 +0200 Ben Green <[email protected]> napsal(a): > Petr, > > I have noticed that the site mentions that transmission from the > reader to the computer is encrypted, some mention that this is > optional and the readers from DigitalPersona (the 4500 anyway) also > employ encryption, is this the general trend and does it make it > difficult for us to write drivers? I mean we would have to > reverse-engineer the code to decipher a proprietary encryption > protocol (I am not a cryptanalyst and I am unsure if I could reverse > engineer a relatively complex driver). > > I do not have a 1660 so I cannot really try out your code but I have > purchased a Eikon scanner that incorporates the TCS4C reader, I will > try to get that working soon. I will, of course, submit my code here > for your perusal. > > Keep up the good work, I wish you luck. > > Benjamin. > _______________________________________________ > fprint mailing list > [email protected] > http://lists.reactivated.net/mailman/listinfo/fprint -- Petr Dlouhý _______________________________________________ fprint mailing list [email protected] http://lists.reactivated.net/mailman/listinfo/fprint
