[cryptography] CAPTCHA as a Security System?

Darren J Moffat darrenm at opensolaris.org
Tue Jan 3 08:19:16 EST 2012

On 01/03/12 06:54, Peter Gutmann wrote:
> =?UTF-8?Q?lodewijk_andr=C3=A9_de_la_porte?=<lodewijkadlp at gmail.com>  writes:
>> Our cozy dutch supermarkets are trying self-checkout systems themselves. They
>> sometimes check carts with what's scanned. My dad's theory was that people
>> are so afraid to have forgotten that they'd most likely scan their products
>> multiple times more often than they forgot, and that relatively little people
>> steal anyway.
> The way it's done here, the checkout system knows the approximate weight of
> each item that you scan, and if you don't add an item of that weight to the

Which is a real pain when you buy plants just after they have been watered !

Darren J Moffat

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