Fingerprint Software Developement

[Davood Firoozian]

Hia,

Asking again I'm working on a an client server application which uses
freeradius in back end and a custom build finger print scanner at front, I
have to develope a customized VPN Client to dial in to a network, would you
please take time and help me find some docs and information on this issue.

my problems are:
1- which protocol I have to use and how, I think and radius docs said chap
is very good for this purpose but how I can use it to send fingerprint
encrypted feature to my server
2- how can I get the feature in the back, have I to customize freeradius
core engine ?
3- it's better to use ldap beside my server or mysql is enough ?
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