Biometrics

[Fairlight]

Only Kenneth Brody would say something like:
> 
> Well, of course it's going to be "unique to each person".  Otherwise,
> it's not a very good ID, is it?

No.  Of course if the odds of a false match are 1:10000 or better, it's
good enough for some applications.

> However, even the same finger, taken by the same scanner, will not
> likely give identical data on more than one scan.  Every time you
> scan the finger, you will probably get different biometric data.
> (Unless you happen to place the finger with the exact same pressure
> on the exact same place on the scanner, causing the scanner to give
> an identical image.)

If it's not returning identical data, then what good is it?  If you get
'abc' one time and 'abg' the next, then how is it supposed to validate a
thing?  If it's based on a range of probable matches, then suddenly you
have a larger potential for overlapping false positive matches.  This
is starting to sound less like science and more like a gimmick with
each passing revelation.  Sounds like a more appropriate term would be
bioguesstricks.

If anyone has pointers to particularly good articles on how it actually
works and why it should be deemed reliable in light of a statement like the
one Ken just put forth, I'm up for a little "light" reading.  I somehow
doubt that places would be using it if it doesn't work accurately, but so
far what's been presented here doesn't indicate that it should.

And I'd surmise that anyone even considering blowing $4k on it would want
to know at least the basics about it.  You might even consider putting
background refernces on the product web page, if you haven't already.

mark->
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