According to a show of hands among Shmoocon's audience, dozens of the several hundred conference attendees in the room had contactless cards, and about a quarter of those weren't aware of it until Paget asked them pull out their cards and check for contactless symbols. Visa calls its technology payWave, MasterCard dubs it PayPass, Discover brands it Zip, and American Express calls it ExpressPay. "You were planning on cancelling that card, weren't you?" she added somewhat sheepishly.Ĭontactless cards are far more common than they might seem: According to the Smart Card Association, about 100 million of the RFID-enabled cards are in circulation. If anyone still doubted that the trick had worked, Paget accidentally flashed the volunteer's credit card number on a screen in front of an audience of hundreds of hackers and security researchers.
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