An arrangement for providing protection to wireless portable transponders (including resonant tags such as RFID tags) from unauthorized interrogation by employing a mechanical means for disabling reception by or from the antenna of the transponder. The tags can be protected from receiving or providing...http://www.google.com/patents/US20060132313?utm_source=gb-gplus-sharePatent US20060132313 - System and method for altering or disabling RFID tags
