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I'm making a system based on web technologies, which means that my interaction with hardware is very limited (keyboard/mouse).

I would like to modify/write some code/driver that makes my fingerprint reader to send an unique encoded image hash (base64/md5/sha512) through the keyboard communication.

I just need some initial information, how do I start it, what should I learn, where should I learn. The learning curve is HUGE, but it's cool =)

Thanks

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A fingerprint reader basically gives you a picture. Getting the md5 or other hash of that picture would be pointless as it would depend on the exact position of the finger. You can retrieve the picture and reencode it if you like. What do you want to do with it? This is not at all clear from your question. –  Gilles Dec 18 '12 at 23:31
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