[ltp] Fingerprint reader and the Bios

[George Katsitadze]

On Thu, Dec 15, 2005 at 08:55:50AM +0100, Michele Campeotto wrote:
> On 12/15/05, Sean Dague <sean@dague.net> wrote:
> > Doesn't really matter though.  With an egg of Play-Doh you can fool the
> > thing: http://www.yubanet.com/artman/publish/article_28878.shtml
> 
>   Not really, the ThinkPad fingerprint reader is a swipe sensor just
> to prevent that. Imagine what happens when you sweep a ball of
> Play-Doh on something.
>   The fooled sensor was just taking pictures of the fingerprint and
> analyzing those, not that surprising it's so easily confused. With
> that kind of contact sensor you can get a nice fingerprint by just
> taking a picture of the sensor surface.
> 

OK then, how does the ThinkPad sensor work? In other words,
what does it sense?

Regards,
George