Protect Yourself from RFID: Fend off frightening tracking tech.

Acreepy new spying technology called radio-frequency identification (RFID) is starting to show up on products you buy at stores like Walmart, and it could be used to track your every move. RFID uses tiny microchips hooked up to miniature antennas to track items from a distance. This chip and antenna combination is called an RFID tag. Each tag contains an ID number that uniquely identifies the item to which it is attached. It is like a Social Security number for things. RFID tags are tracked by RFID reading devices. These readers gather information from the tags via radio waves, similar to the radio waves that allow you to listen to your favorite FM radio station. RFID radio waves, like FM radio waves, travel invisibly through solid objects such as purses, backpacks, wallets, and shopping bags.