I want to write this sistemku (seen in the Internet, but they didn't suit me — only small window and list of devices). How see yourself: a user downloads the utility on the PC, which will scan the fingerprint and send it to the server. The server will provide API to third-party websites for authentication.
But here is interesting how to be with security. If you send a fingerprint, it can intercept and exploit. If encrypted, then the cipher can be cracked, Ulomov desktop utility. In addition, during each scan of the print will be slightly different (finger flinched a little bit when held, for example). Anyone have any ideas how this can be done?