Radio frequency identification tag and radio frequency identification privacy protection system and method

• US 20070069851A1
• Filed: 04/06/2006
• Published: 03/29/2007
• Est. Priority Date: 09/28/2005
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kim, Dae-youb, Jin, Weon-il, Kim, Hwan-joon, Sung, Maeng-hee
• Granted Patent: US 7,755,469 B2
• Time in Patent Office: Days
• US Class Current: 340/5.100
• CPC Class Codes: H04L 2209/805 Lightweight hardware, e.g. radio-frequency identification [RFID] or sensor
• CPC Class Codes: H04L 9/3271 using challenge-response

Abstract

A radio frequency identification (RFID,) tag, an RFID privacy protection system, and an RFID privacy protection method are provided. The RFID privacy protection method includes a pseudo identification (ID) used to authenticate the RFID reader and a key used to generate the pseudo ID are received; if the pseudo ID is received in response to an information request signal for reading information of the RFID tag comprising the pseudo ID, the key is transmitted; and if a pseudo ID generated using the key is equal to the pseudo ID received in response to the information request signal, an RFID of the RFID tag to read the information of the RFID tag is received.

Claims

1. A radio frequency identification (RFID) privacy protection method applied to an RFID privacy protection system comprising an RFID tag and an RFID reader, the method comprising:

receiving a pseudo identification (ID) used to authenticate the RFID reader and a key used to generate the pseudo ID;

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 the key to the RFID reader; and

if a pseudo ID generated using the key is equal to the pseudo ID received in response to the information request signal, receiving an RFID of the RFID tag to read the information of the RFID tag.

2. The RFID privacy protection method of claim 1, further comprising writing a common pseudo ID generated using a common key of the RFID privacy protection system to the RFID tag.

3. The RFID privacy protection method of claim 2, wherein the common pseudo ID written in response to the information request signal for reading the information of the RFID tag is received.

4. A radio frequency identification (RFID) tag of an RFID privacy protection system comprising the RFID tag and an RFID reader, the system comprising:

a transceiver for receiving and transmitting a pseudo ID and a key;

a tag storage for storing the pseudo ID used to authenticate the RFID reader;

a determiner for determining whether the stored pseudo ID is equal to a pseudo ID generated using the received key, if a key corresponding to the pseudo ID transmitted in response to an information transmission request signal of the RFID reader is received; and

a tag controller for transmitting an RFID of the RFID tag through the transceiver, if the stored pseudo ID is equal to the generated pseudo ID.

5. The RFID tag of claim 4, wherein the tag storage stores a common pseudo ID generated using a common key of the RFID privacy protection system.

6. A radio frequency identification (RFID) privacy protection system comprising an RFID tag and an RFID reader, the comprising:

a transceiver for receiving and transmitting a pseudo ID and a key;

an RFID interface for transmitting an information request signal for reading information of the RFID tag;

a storage for storing a pseudo ID received through the transceiver to be used to authenticate the RFID reader and a key used to generate the pseudo ID; and

a controller for transmitting the key through the RFID interface and receiving the RFID of the RFID tag, if the pseudo ID is received in response to the information request signal.

7. The RFID privacy protection system of claim 6, wherein if the pseudo ID is changed, the storage stores a common key used to generate the changed pseudo ID.

8. The RFID privacy protection system of claim 6, wherein the controller writes a common pseudo ID generated using the common key of the RFID privacy protection system to the RFID tag.