Re: Slightly icky new biometric

["Tomas L. Byrnes" <tomb () byrneit net>]

Your primary assumption is FALSE.


Different bacteria, and different strains of the same bacteria, have
varying resistance to all types of countermeasures.



> -----Original Message-----
> From: funsec-bounces () linuxbox org [mailto:funsec-bounces () linuxbox org]
> On Behalf Of Valdis.Kletnieks () vt edu
> Sent: Thursday, March 18, 2010 4:17 AM
> To: Jim Murray
> Cc: funsec () linuxbox org
> Subject: Re: [funsec] Slightly icky new biometric
>
> On Thu, 18 Mar 2010 10:59:10 -0000, Jim Murray said:
>
> > Seems a somewhat dubious biometric to me. Wouldn't simply putting
> your
> > hands in bleach (or similarly strong bug-killing solution) be enough
> > to significantly change the makeup of bacteria there?
>
> The problem is that bleach will kill all the little bugs fairly
evenly,
> so 99% of *everything* dies off.  There's still plenty of those
oddball
> genome bugs left over for identification purposes.  If your bacteria
> mix was 42% A, 17% B, and small amounts of of statistically rare C, E,
> and J, then after the bleach you'll still have roughly that same mix.
> And if after bleach they find a keyboard that's got lots of A, a bit
of
> B, and traces of C, E, and J, that may not be enough to convict you,
> but it's probably good enough to hang a search warrant on.

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