DETECTING RFID TAG AND INHIBITING SKIMMING

• US 20130106576A1
• Filed: 10/31/2011
• Published: 05/02/2013
• Est. Priority Date: 10/31/2011
• Status: Active Grant

• Current Assignee: Eastman Kodak Company
• Original Assignee: Eastman Kodak Company
• Inventors: Hinman, Mark P., Keterberg, James Alan
• Granted Patent: US 9,000,892 B2
• Time in Patent Office: Days
• US Class Current: 340/10.1
• CPC Class Codes: G06K 7/10267 the arrangement comprising a circuit inside of the interrogation device
• CPC Class Codes: H04K 2203/20 for contactless carriers, e.g. RFID carriers
• CPC Class Codes: H04K 3/43 characterized by the control of the jamming power, signal-to-noise ratio or geographic coverage area
• CPC Class Codes: H04K 3/65 using deceptive jamming or spoofing, e.g. transmission of false signals for premature triggering of RCIED, for forced connection or disconnection to/from a network or for generation of dummy target signal
• CPC Class Codes: H04K 3/822 by detecting the presence of a surveillance, interception or detection

Abstract

A method of detecting an RFID tag includes transmitting a bait RFID read signal at a bait power level and a simulated response signal at a simulated-response power level. A selected reader frequency is monitored for a selected detection time. A skimmer is determined to be present if a skimmer RFID read signal is detected during that time. If a skimmer is not determined to be present, multiple read signals are transmitted sequentially, each signal at a respective read power level. At least one of the read power levels is lower than the bait power level, at least one of the read power levels is lower than the simulated-response power level, and at least two of the read power levels are different from each other. A selected response frequency for a tag is monitored for a response from an RFID tag.

Claims

1. A method of detecting an RFID tag, comprising:

transmitting a bait RFID read signal at a bait power level using an RFID reader;

transmitting a simulated response signal at a simulated-response power level;

a skimmer-detection step of automatically monitoring a selected reader frequency for a selected detection time using a controller, wherein a skimmer is determined to be present if a skimmer RFID read signal is detected during the selected detection time;

if a skimmer is not determined to be present, transmitting multiple read signals sequentially; and

monitoring a selected response frequency for a tag response from an RFID tag, wherein the tag is detected if the tag response is received.

2. The method according to claim 1, wherein each read signal is transmitted at a respective read power level and at least two of the read power levels are different from each other.

3. The method according to claim 2, wherein at least one of the read power levels is lower than the bait power level and at least one of the read power levels is lower than the simulated-response power level.

4. The method according to claim 1, wherein each read signal after a first-transmitted one of the read signals is transmitted at a selected time interval after the preceding read signal.

5. The method according to claim 1, wherein each read signal includes respective authorization data.

6. The method according to claim 1, wherein the skimmer-detection step further includes monitoring the selected response frequency for the selected detection time.

7. The method according to claim 1, further including, after transmitting one of the read signals, monitoring a selected second reader frequency for a selected second detection time, wherein a skimmer is determined to be present if a skimmer RFID read signal is detected during the selected second detection time.

8. The method according to claim 7, wherein the selected second reader frequency is different than the selected reader frequency and the selected second detection time is different than the selected detection time.

9. The method according to claim 1, further including, after transmitting one of the read signals, transmitting a second simulated response signal.

10. The method according to claim 9, further including, after transmitting the second simulated response signal, monitoring a selected second reader frequency for a selected second detection time, wherein a skimmer is determined to be present if a skimmer RFID read signal is detected during the selected second detection time.

11. The method according to claim 10, wherein the selected second reader frequency is different than the selected reader frequency and the selected second detection time is different than the selected detection time.

12. The method according to claim 1, further including, if a skimmer is determined to be present, reporting an alert, collecting forensic evidence, labeling the RFID tag as corrupt, deactivating the RFID tag, or storing an indication of the skimming in the RFID tag or a memory.

13. The method according to claim 1,

wherein each read signal has a signal characteristic selected from the group consisting of a received power level of the respective read signal, the time interval between the respective read signal and a preceding or following read signal, and identification data included in the respective read signal, whereby each characteristic has a respective type of “

power level,”

“

time interval,”

or “

identification data,”

respectively,

so that the sequential transmission of the multiple read signals transmits an authorization sequence of signal characteristics.

14. The method according to claim 1, wherein the type of a first selected one of the read signal characteristics is different than the type of a second selected one of the read signal characteristics.