Millions of point-of-sale systems and hotel room locks can be hacked by temporarily placing a small, inexpensive device several inches away from their card readers.
The device, due to be presented Sunday at the DEF CON conference in Las Vegas, is the creation of Weston Hecker, a senior security engineer at Rapid7. It was inspired by MagSpoof, another device created last year by security researcher Samy Kamkar.
