Re:A more practical approach: Normal Wallet and Fo (Score 1)

The card read goes to a physical security panel, not to a PC. The users transaction info is sent to the PC from the panel. It consists of the door's ID#, the card number, and the time the transaction took place (in general). Theres tons of different kinds of card formats (Weigand, etc) and not all card readers can extrapolate the information correctly. So don't worry about your credit card RFID tag being read by the access control system.