Somehow I think they would be extremely reluctant to tell anyone what they use inside their ATMs....
Security through obscurity... most of them are not even encrypted and if they use dial-up lines (instead of dedicated lines) it's often just like the point of sale stuff.. 1200/2400 baud dial-on demand, it takes a few seconds to sync, send a short text string, get a reply auth. On the other side.. I just inherited some hardware encrypted triple-des modems and serial interface cards, as well as a Cylink V.35 hardware encryption 'shim' with valid keys for a large banks wire transfer department... I guess I should ship it to them. From Argentina? (Just kidding, I like being an American Citizen) As a part of other work we do here, we deal with ACH money transfers. The backup method of connection to one institution that we help a customer move millions per day through is a plain text e-mail to an AOL address. We've tried to explain, even refused to send the files, but no clue is in sight. They don't even want them zipped. Secure e-commerce is a farce, even at the corporate giant level. --Mike--