[43458] in Cypherpunks
Re: credit card conventional wisdom (fwd)
daemon@ATHENA.MIT.EDU (Simon Spero)
Wed Nov 15 21:50:44 1995
Date: Wed, 15 Nov 1995 18:45:23 -0800 (PST)
From: Simon Spero <ses@tipper.oit.unc.edu>
To: cypherpunks@toad.com
In-Reply-To: <Pine.SOL.3.91.951115182044.18955B-100000@chivalry>
Further info:
The AMEX digits aren't part of the standard info- someone I spoke to
who started off as a grey box programmer said that he thought they were
just process control.
Card-present/Card-not-present can be determined from info on the
magnetic stripe; for visa cards, this info is stored in a three-digit
checksum at the end of the discretionary info.
Card Imprints taken with no online authorisation are typically charged a
transaction fee of 3-6%: with authorisation, 1.5-3%. ATM card
transactions are charged at around $0.10 per transaction.
Simon
