They are not rfid devices.
QuoteThey are not rfid devices.Some of the newer cards have NFC chips in them which at least use the same frequency (13.56MHz) and if a NFC compatible shield is used, may be read. If they answer to any request not conforming to their (unknown to me) standard isn't very likely.
So why not use a magnetic card swipe reader?
Are you talking about the cards with this logo on them? (next to MC logo)