Another EUSecWest NFC Trick: Ride the Subway For Free

itwbennett writes "At the EUSecWest security conference in Amsterdam, researchers showed how their 'UltraReset' Android app can read the data from a subway fare card, store that information, and reset the card to its original fare balance. The researchers said that the application takes advantage of a flaw found in particular NFC-based fare cards that are used in New Jersey and San Francisco, although systems in other cities, including Boston, Seattle, Salt Lake City, Chicago and Philadelphia, could also be vulnerable."