Can RFID reading be jammed or otherwise obstructed?
Yes. A metal or foil-lined container that is impenetrable to radio-frequency waves is known as a Faraday cage. An RFID tag in a Faraday cage is effectively unreadable. It is also possible to jam the reading of RFID tags with devices that broadcast powerful, disruptive radio signals. Such jamming devices, however, will in most cases violate government regulations on radio emissions.
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