On 10/01/2012 20:33, Jimmy wrote:
John wrote:
In the NY area, ATMs tend to be located in an inside lobby, with a
latch on the door you can open by swiping any ATM or credit card.

Not just an ATM or credit card -- anything with a magstripe.
Including a Metrocard, which has a totally different encoding scheme.

It's clear the door lock devices aren't reading your complete card
number, since you only have to put your card in a fraction of an inch
before the door unlocks.

Jimmy
I thought that you could run about any card through a magstripe reader
in order to gain access to a bank.

Also, even if it is indeed the case that people are hoping to clone your
card by replacing a real magstripe reader with a phony one, they still
need your number.