Another family of hacks involves stealing information in order to create and use a duplicate card. This is called “skimming,” and has become widespread and sophisticated over the years. The canonical hack involves placing a second magnetic-stripe reading device over a card slot, so that the customer unwittingly slides his card through the malicious reader along with the ATM’s real reader. Add a hidden camera or a sensor on the keypad, and a criminal can steal the PIN as well.
