Association for Automatic Identification and Mobility
"Radio frequency identification (RFID) is a generic term that is used to describe a system that transmits the identity (in the form of a unique serial number) of an object or person wirelessly, using radio waves. It's grouped under the broad category of automatic identification technologies.

RFID is in use all around us. If you have ever chipped your pet with an ID tag, used EZPass through a toll booth, or paid for gas using SpeedPass, you've used RFID. In addition, RFID is increasingly used with biometric technologies for security.

Unlike ubiquitous UPC bar-code technology, RFID technology does not require contact or line of sight for communication. RFID data can be read through the human body, clothing and non-metallic materials."


Now watch the Wardriving Video:
http://www.youtube.com/watch?v=9isKnDiJNPk...player_embedded

and Hacking RFID Cards:
http://www.youtube.com/watch?v=4jpRFgDPWVA

Coming to a Passport, Credit Card or Driver's License near you...or on you!. Is your ID RFID tagged yet?

There are two materials which impede Radio Signals... Water & Metal; specifically Aluminum Foil...yet, pull out your card to use & your ID is vulnerable!

And, exploiting RFID.............."RFID Viruses and Worms"
Vu University, Amsterdam
http://www.rfidvirus.org/