>>40
You have to show the ID card. 13.56 MHz HF RFID can be read from as far as 1m, and that is the frequency used in your <b>credit cards</b>, next time you walk past me I'm gonna steal your CC. Because credit companies either <b>do not use any encryption at all sending all in plain text</b> or going the 'security through obscurity' way. I also bet RFID chips implanted would be 128 KHz and that shit can be read from even longer distances. With extremely powerful readers mounted on walls and other stationary points, even exceeding 20m same with HF ones, as long as you have powerful readers.