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US 2010/0148964 A1Published application
Rogue rfid detector
AssigneeSymbol Technologies, Inc.
InventorDirk A. Broer
Life of this patent
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Abstract
A system, techniques, and apparatus for detecting rogue RFID readers are disclosed. The system detects unauthorized reader to tag communication, and with multiple detectors, provides location information concerning one or more unauthorized readers. The system can detect high power commands of an unauthorized reader(s) in predefined areas and be integrated with an article surveillance system.
Claims22
A method of detecting unauthorized RFID reader to tag communication comprising:
- identifying an interrogating Radio Frequency (RF) wave directed to a population of RFID tags, the interrogating wave having a first intensity greater than a second wave intensity transmitted by each of the population of RFID tags;
- comparing source identifying information associated with the wave to source identifying information associated with at least one allowable RFID reader;
- and
- detecting an unauthorized RFID reader access to at least one of the population of RFID tags based on the comparison.
1 more element
A RFID reader comprising:
- an antenna;
- a transducer operatively coupled to the antenna to transmit and receive Radio Frequency (RF) waves;
- and
- a signal processor to process the waves, the signal processor configured to include a processor and memory configured to include memory storing instructions that, in response to a request, cause the processor to:
- identify an interrogating Radio Frequency (RF) wave directed to a population of RFID tags, the interrogating wave having a first intensity greater than a second wave intensity transmitted by each of the population of RFID tags;
- compare source identifying information associated with the wave to source identifying information associated with at least one allowable RFID reader;
- and
- detect an unauthorized RFID reader access to at least one of the population of RFID tags based on the comparison.
5 more elements
An RFID system comprising:
- a RFID tag;
- a RFID reader configured to transmit and receive Radio Frequency (RF) waves to the RFID tag, the RFID reader configured to include a detection module that 1) identifies an interrogating Radio Frequency (RF) wave directed to the tag, the interrogating wave having a first intensity greater than a second wave intensity transmitted by the tag, 2) compares source identifying information associated with the wave to source identifying information associated with at least one allowable RFID reader, and 3) detects an unauthorized RFID reader access to the tag based on the comparison.
Dependencies are inferred from the claim text.