They showed a CEO on tv about security where his company used rfid chips to get into the office building. You just held up this thing to the lock and it would authenticate you. One of the hackers if you will walked past the CEO in the parkinglot and swiped a handheld reader as they walked past each other and the information was copied. The hacker then walked up to the door and transmitted the info he'd just copied and voila, access granted. Secure huh?