FourthAge writes "Federal agents at the Defcon 17 conference were shocked to discover that they had been caught in the sights of an RFID reader connected to a web camera. The reader sniffed data from RFID-enabled ID cards and other documents carried by attendees in pockets and backpacks. The 'security enhancing' RFID chips are now found in passports, official documents and ID cards. 'For $30 to $50, the common, average person can put [a portable RFID-reading kit] together,' said security expert Brian Marcus, one of the people behind the RFID webcam project. 'This is why we're so adamant about making people aware this is very dangerous.'"