Method of Securely Reading Data From a Transponder

• US 20080192932A1
• Filed: 05/19/2006
• Published: 08/14/2008
• Est. Priority Date: 05/20/2005
• Status: Active Grant

• Current Assignee: NXP B.V. (NXP Semiconductors NV)
• Original Assignee: NXP B.V. (NXP Semiconductors NV)
• Inventors: Graeber, Frank, Tobergte, Wolfgang
• Granted Patent: US 9,542,630 B2
• Time in Patent Office: Days
• US Class Current: 380/258
• CPC Class Codes: G06K 17/00 Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations
• CPC Class Codes: G06K 7/0008 General problems related to the reading of electronic memory record carriers, independent of its reading method, e.g. power transfer

Abstract

The invention discloses a method of reading data (dat) from a first transponder (TAG1) into a transceiver (REA). Said (dat) are only transmitted from the first transponder (TAG1) to the transceiver (REA) when a second transponder (TAG2) is present within the RFID communication range of the transceiver (REA) and if a positive authentication procedure between the two transponders (TAG1, TAG2) within the RFID communication range of the transceiver (REA) takes place. The second transponder (TAG2) is preferably a stationary transponder (TAG2), whereas the first transponder (TAG1) may be a mobile transponder The invention further relates to transponders (TAG1, TAG2) as well as to a transceiver (REA) used in such a method of reading data (dat). Furthermore, the invention relates to a poster (POS), to which a first transponder (TAG1) is attached, and to a poster wall (WAL) for attaching such a poster (POS) and a second transponder (TAG2).

Claims

1. A method of reading data from a first transponder into a transceiver, wherein

when said first transponder and a second transponder are within the RFID communication range of the transceiver at the same time the transceiver performs the following steps:

after sending a request for transmitting data to the first transponders receiving an exchange information from said first transponder

transmitting said exchange information to said second transponder,

receiving an encrypted information from the second transponder, which encrypted information represents the exchange information of the first transponder scrambled with a key of the second transponder,

transmitting said encrypted information to the first transponder,

receiving—

provided that the first transponder permits access to the data—

the requested data from the first transponder.

2. A method as claimed in claim 1, wherein the transceiver—

after sending the request to the first transponder and before receiving said exchange information from the first transponder—

performs the following steps;

receiving a further, first exchange information from the second transponder,

transmitting said first exchange information to the first transponder,

receiving a first encrypted information from the first transponder, which first encrypted information represents the exchange information of the second transponder scrambled with a key of the first transponder, and

transmitting said first encrypted information to the second transponder.

3. A method as claimed in claim 1, wherein the second transponder is a stationary, immobile transponder.

4. A method as claimed in claim 1, wherein the exchange information is a random number.

5. A method as claimed in claim 1, wherein the first and the second transponder are passive transponders.

6. A method as claimed in claim 1, wherein the first and the second transponder are identical.

7. A transponder for communicating with a further transponder via a transceiver wherein the transponder comprises

exchange information generating means for generating exchange information,

transmitting means for transmitting said exchange information to a transceiver,

receiving means for receiving encrypted information from said transceiver,

decrypting means for decrypting said encrypted information, and

comparing means for comparing the resulting information of the decryption of the encrypted information with the exchange information generated with the generating means.

11. A poster, wherein a transponder according to claim 7 attached to said poster.

12. A poster-wall, wherein a poster according to claim 11 and a transponder are attached to said poster-wall.

8. A transponder for communicating with a further transponder via a transceiver, wherein the transponder comprises

receiving means for receiving exchange information from a transceiver,

encrypting means for encrypting said exchange information, and

transmitting means for transmitting an encrypted information resulting from the encryption of said exchange information to the transceiver.

9. A transponder for communicating with a further transponder via a transceiver, wherein the transponder comprises

exchange information generating means for generating exchange information,

transmitting means for transmitting said exchange information and for transmitting an encrypted information resulting from the encryption of a received exchange information to the transceiver,

receiving means for receiving encrypted information and for receiving exchange information from a transceiver,

decrypting means for decrypting said encrypted information,

comparing means for comparing the resulting information of the decryption of the encrypted information with the exchange information generated with the generating means, and

encrypting means for encrypting said exchange information.

10. A transceiver for controlling the communication of two transponders, wherein the transceiver comprises

receiving means for receiving exchange/encrypted information from the first/second transponder, and

transmitting means for transmitting exchange/encrypted information received from the first/second transponder, which exchange/encrypted information is intended to be transmitted to the second/first transponder, to the second/first transponder.