Patent ID: 9740894
Date: 2017-08-22
CPC Classifications: G06K

Claim:
1. A method implemented in a radio frequency identification (RFID) tag, the method comprising: receiving, from an RFID reader, a sleep command; generating a silent key responsive to receipt of the sleep command; transmitting the silent key to the RFID reader subsequent to the generating of the silent key; changing the RFID tag from a standard state to a silent state responsive to receipt of the sleep command, the standard state configured to respond to commands from the RFID reader, the silent state configured to only respond to an awake command from the RFID reader; receiving, from the RFID reader, the awake command and the silent key while the RFID tag is in the silent state; and changing the RFID tag from the silent state to the standard state responsive to processing the awake command with the silent key, the processing the awake command comprising verifying the silent key received by the RFID reader against the silent key generated by the RFID tag prior to changing the silent state of the RFID tag to the standard state.