[113191] in cryptography@c2.net mail archive
Re: Foibles of user "security" questions
daemon@ATHENA.MIT.EDU (Peter Gutmann)
Mon Jan 14 17:34:16 2008
From: pgut001@cs.auckland.ac.nz (Peter Gutmann)
To: fw@deneb.enyo.de, leichter_jerrold@emc.com
Cc: cryptography@metzdowd.com
In-Reply-To: <8763y0uka1.fsf@mid.deneb.enyo.de>
Date: Sat, 12 Jan 2008 16:20:53 +1300
Florian Weimer <fw@deneb.enyo.de> writes:
>* Jerry Leichter:
>> I can just see the day when someone's fingerprint is rejected as
>> "insufficiently complex".
>It's been claimed that once you reach the retirement age, one person in ten
>hasn't got any fingerprints which can be used for biometric purposes.
It's not just older people, it's manual workers, children, and (as a
generalisation for all biometrics) "goats", the percentage of the overall
population who don't produce useful results for whatever biometric is being
employed. The population of goats (for a reasonable FAR/FRR) is usually in
the low single digits. The standard response to goats is to wind down the FRR
until the problem is no longer noticeable. More on this in
http://www.cs.auckland.ac.nz/~pgut001/pubs/biometrics.pdf.
(FAR = false acceptance rate, FRR = false rejection rate).
Peter.
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