From: Peter Gutmann <pgut...@cs.auckland.ac.nz> To: cryptography@randombit.net, rv...@insightbb.com Sent: Tue, 03 Jan 2012 01:51:26 -0500 (EST) Subject: Re: [cryptography] CAPTCHA as a Security System?
Randall Webmail <rv...@insightbb.com> writes: >>My neighborhood Wal*Mart has pretty much eliminated cashiers in favor of >>self-checkouts. >Don't they have minders that watch the self-checkouts? The way they're set up here your chances of sneaking an item out is probably about as good as it would be with a human-controlled checkout, and for anything more than one or two small items there's not much chance. There is one girl (and it is always a girl) who is at the control center. She comes to the checkout station to override the system when the shopper scans beer. No one watches to see if you scan every item in your cart. Most people don't steal, and it's cheaper for Wal*Mart to allow the thieves to ply their trade than it is to put $8.00/hour girls in place to (mostly) stop those who do. _______________________________________________ cryptography mailing list cryptography@randombit.net http://lists.randombit.net/mailman/listinfo/cryptography
