Radio frequency identification devices and reader systems

摘要

An RFID device such as an RFID tag (2) and method comprising: storing a current read key and a current ownership key; receiving, from the RFID reader system (4), a change read key command and an indication that the RFID reader system (4) holds the current ownership key; and in response, replacing the current read key with a new current read key enabling the RFID device (2) to be read by an RFID reader system (4) holding the new current read key. Also, an RFID reader system (4) and method for an RFID reader system (4) to process an RFID device (2), comprising: issuing a take ownership command to an RFID device (2); receiving a new ownership key from the RFID device (2); applying for authorization of the new ownership key; and receiving from the authorization apparatus (6) the new ownership key and an acknowledgement that may be communicated to the tag as evidence of authorization.

主权项

1. An RFID device, comprising:
a current read key for encrypting device data on the RFID device such that it is readable by an RFID reader system also holding the current read key; a current ownership key; and a receiver configured to receive, from the RFID reader system, a change read key command, a take ownership command and an indication that the RFID reader system holds the current ownership key; wherein the take ownership command is indicative of a request for generation of a new ownership key; and the RFID device is configured to replace, responsive to receiving the change read key command and the indication that the RFID reader system holds the current ownership key, the current read key held on the RFID device with a new current read key, the new current read key being for encrypting the device data on the RFID device such that said device data is readable by the RFID reader system or another RFID reader system also holding the new current read key.