Long-time Slashdot reader UnCivil Liberty writes:
Following in the footsteps of three MIT students who were previously gagged from presenting their findings at Defcon 2008 are two Massachusetts teens (who presented at this year’s Defcon without interference).
The four teens extended other research done by the 2008 hacker team to fully reverse engineer the “CharlieCard,” the RFID touchless smart card used by Boston’s public transit system. The hackers can now add any amount of money to one of these cards or invisibly designate it a discounted student card, a senior card, or even an MBTA employee card that gives them unlimited free rides. “You name it, we can make it,” says Campbell.