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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