Patent ID: 7755469

Claim:
A radio frequency identification (RFID) privacy protection method applied to an RFID privacy protection system comprising an RFID tag including a pseudo identification (ID) and a RFID that is different from the pseudo ID, and an RFID reader, the method comprising: receiving, by the RFID reader, the pseudo ID, from the RFID tag; transmitting, by the RFID reader, the pseudo ID received from the RFID tag to an authentication service provider; receiving, by the RFID reader, a key used to generate a pseudo ID from the authentication service provider; if the pseudo ID is received in response to an information request signal for reading information of the RFID tag comprising the pseudo ID, transmitting, by the RFID reader, the key to the RFID tag; and if a pseudo ID generated using the key is equal to the pseudo ID received in response to the information request signal, receiving, by the RFID reader, the RFID of the RFID tag to read the information of the RFID tag, wherein the pseudo ID is not a substantial RFID of the RFID tag, but an ID used to authenticate regardless if the RFID reader that transmitted the RFID request signal is able to read private information set in the RFID tag, and the RFID is provided after the authentication.