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The Lazarus Effect: Resurrecting Killed RFID Tags

Several RFID Standards allow RFID Tags to be ‘killed’ using a specialised command code. ‘Killed’ RFID Tags should be irrevocably deactivated. In actuality, when a valid kill command is sent to a tag four sections of the tags management data are zeroed causing the tag to enter a ‘fault state’ and thus be ignored by RFID readers. Through the re­initialisation of these four sections to valid values it was discovered that a tag could be resurrected and function normally.