Fingerprinting RFID Chips

Fingerprinting RFID Chips: "This research centers on looking at the radio characteristics of individual RFID chips and creating a 'fingerprint.' It makes sense; fingerprinting individual radios based on their transmission characteristics is as old as WW II. But while the research centers on using this as an anti-counterfeiting measure, I think it would much more likely be used as an identification and surveillance...

"