Patent ID: 7602291

Claim:
A method for verifying authenticity of an object to be implemented using a system that includes a radio frequency identification (RFID) tag associated with the object, an electronic device, and an authenticating center, said method comprising the steps of: (A) enabling the electronic device to generate and wirelessly transmit a request signal; (B) in response to the request signal, enabling the RFID tag to generate a first authentication code based on a varying secret key, a second authentication code based on a unique identification code of the RFID tag and the varying secret key, and a third authentication code that is based on the unique identification code of the RFID tag and the first and second authentication codes, and to wirelessly transmit the third authentication code for reception by the electronic device; and (C) enabling the electronic device to forward the third authentication code received from the RFID tag to the authenticating center for verification.