[17443] in cryptography@c2.net mail archive
Re: "Retailers Experiment With Biometric Payment" article
daemon@ATHENA.MIT.EDU (Eugen Leitl)
Thu Jun 9 18:28:18 2005
X-Original-To: cryptography@metzdowd.com
X-Original-To: cryptography@metzdowd.com
Date: Thu, 9 Jun 2005 18:24:18 +0200
From: Eugen Leitl <eugen@leitl.org>
To: Adam Shostack <adam@homeport.org>, cryptography@metzdowd.com
In-Reply-To: <20050609160213.GA31138@lightship.internal.homeport.org>
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On Thu, Jun 09, 2005 at 12:02:20PM -0400, Adam Shostack wrote:
> Has anyone ever studied the reversability of these algorithms? It
> seems to me that you could make some plausible guesses and generate
> fingerprints from certain representations. I don't know how likely
> those guesses are to be right.
The fingerprint hash (fingerprint's fingerprint) has to be resistant=20
to rotation/translation, area size and subpattern presence, and tolerate=20
some skin lesion noise, so it's the very opposite of a cryptographic hash.
Probably quite easy to reverse.
--=20
Eugen* Leitl <a href=3D"http://leitl.org">leitl</a>
______________________________________________________________
ICBM: 48.07100, 11.36820 http://www.leitl.org
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