[ltp] Fingerprint reader and the Bios

[Peter B. West]

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Michele Campeotto wrote:
>      > > Your fingerprints can be retrieved after the fact.
>      > as I said earlier, this isn't possible with sweep sensors, as the
>      > sweeping itself removes the fingerprint. just have a look at the
>     linked
>     ... and there are no other spots on the laptop that you touch with your
>     bare hands? Say the laptop cover, battery, the keyboard or any other
>     flat
>     surface. About the only part of my thinkpad I do NOT touch is the
>     screen. 
> 
> 
>   oh, the laptop itself... :)
> 
>   yes, correct, I wasn't questioning the security of the device (wich I 
> don't even have), it just seemed that people didn't understand how 
> that's working.

IIUC, that won't do you any good.  The swipe sensors are measuring 
differences in electrical potential between the ridges and valleys of 
your fingerprint. You can't do that with a latent fingerprint; it has to 
be a live finger. There are useful links from an earlier discussion 
about these readers.

Peter
-- 
Peter B. West <http://cv.pbw.id.au/>
Folio <http://defoe.sourceforge.net/folio/>

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