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Date: Thu, 02 Jan 2003 21:41:42 +0100
From: Rene Tschaggelar
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Subject: Re: Biometric fingerprint sensors
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> andy wrote:
>>> I was wondering if there are some units that will also generate an
>>> image of
>>> the fingerprint itself, and if so who makes them.
>>> thanks for any advice / ideas.
> They produce some kind of image that is evaluated by the host system.
> Why put an expensive CPU in the reader?
Simple reasons :
the software is safe in an embedded device, add data security and
fear of tampering.
You don't give 10 years of software development away in a dll.
When transmitting the image of a fingerprint, that could be listenen at,
especially when it is stored on a server, and subsequently reconstructed
from silicon. Therefore only a template that contains the relevant
information in some code is leaving the reader. It has to be made sure
no fingerprint can be reconstructed from the template.
Optimally, the comparison of measured templates and known templates
is also done in the embedded device.
Ing.Buero R.Tschaggelar - http://www.ibrtses.com
& commercial newsgroups - http://www.talkto.net
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