Summary:

* You may need to read the following sentence twice: Aluminum foil hats will block the signals emitted by the radio tags that will replace bar-code labels on consumer goods.
* That is, of course, if you place your tin-foil hat between the radio tag and the device trying to read its signal.
* Makers of RFID (or radio frequency identification) tags, along with the retailers and suppliers who plan to use them, are saying the technology they spent millions of dollars developing is too weak to threaten consumer privacy.
* "Any conductive material can shield the radio signals," said Matt Reynolds, a principal at ThingMagic, which develops RFID systems.

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