US 2010/0073147 A1 · CONTROLLING DATA ACCESS TO AND FROM AN RFID DEVICE

Abstract

It is described a method for controlling data access to and from an RFID device (230). Thereby, an RFID reading device (210b) authenticates himself to the RFID device (230) before the RFID device (230) communicates with the RFID reading device (210b). The RFID device (230) is equipped with a physically uncloneable function (237), which is adapted to produce a unique but unpredictable response signal (R1, R2) upon receiving a predefined challenging signal (C1, C2). During an enrolment of the RFID device a first response signal (R1) being uniquely associated with a first challenging signal (C1) is stored in a memory (238) of the RFID device (230). The first challenging signal (C1) represents a password for opening further data communication with the RFID device (230). When a RFID reading device queries the RFID device (230) with a second challenging signal (C2), the RFID device (230) compares the corresponding response signal (R2) with the response (R1) being stored during enrollment and only if there is a match, responds with its identifier (ID).

Claims14

Dependent claims

A method for controlling the data access to and from an RFID device (130, 230) having a data memory (138, 238) and a physical uncloneable function (137, 237), wherein

the physical uncloneable function (137, 237) is adapted to produce a unique but unpredictable response signal (R1, R2, R3, R4) upon receiving a predefined challenging signal (C1, C2, C3, C4),
the method comprising the steps of:
sending a first challenging signal (C1) to the RFID device (230),
producing a first response signal (R1) based on the first challenging signal (C1) by the physical uncloneable function (237),
storing the first response signal (R1) in the data memory (238) of the RFID device (230),
sending a request signal to the RFID device (230), wherein the request signal comprises a second challenging signal (C2),
producing a second response signal (R2) based on the second challenging signal (C2) by the physical uncloneable function (237),
comparing the second response signal (R2) with the first response signal (R1), and
providing data access to the RFID device (230) if the second response signal (R2) is identical to the first response signal (R1).

6 more elements

An RFID device comprising:

a processing element (239),
a data memory (238) being coupled to the processing element (239), and
a physical uncloneable function (237) being coupled to the processing element (239), wherein
the physical uncloneable function (237) is adapted to produce an unique but unpredictable first response signal (R1) based on a first challenging signal (C1),
the RFID device (230) is adapted to store the first response signal (R1) in the data memory (238),
the physical uncloneable function (237) is adapted to produce an unique but unpredictable second response signal (R2) based on a second challenging signal (C2),
the processing element (239) is adapted to compare the second response signal (R2) with the first response signal (R1), and
the RFID device (230) is adapted to provide data access if the second response signal (R2) is identical to the first response signal (R1).

5 more elements

Dependencies are inferred from the claim text.

Controlling data access to and from an rfid device

Life of this patent

Controlling data access to and from an rfid device

Life of this patent

Abstract

Claims14