1. Place on bottom of vehicle
2. Place two readers exactly 1 m apart on road bed.
3. In a 60km/hour zone - that 1km/min or 16.66 m /sec Oh the readings were less than .06 second apart. You're done.... or the vehicle is......


They're inching closer...

"The active smart tag can signal as far as 20 meters"

Tailgating within 20 meters (or 20-ish yards), or just having someone on the inside of the room near a door wouldn't make the door very secure, would it? Or is the RFID used in conjunction with cameras/motion detectors on the outside of the doors?

Just wondering. :)

Cheers,
John

Olivetti Research Labs in Cambridge did this in the early 90's with "Active Badges" as they were called then. They also had the vision to route your computer session to the nearest terminal in response to an active badge approach.

That's how VNC came into being.