Communications: electrical – Selective – Interrogation response
Reexamination Certificate
2005-11-29
2005-11-29
Zimmerman, Brian (Department: 2635)
Communications: electrical
Selective
Interrogation response
C455S001000
Reexamination Certificate
active
06970070
ABSTRACT:
Techniques are disclosed for providing enhanced privacy in an RFID system comprising a plurality of RFID devices, each having an associated identifier, and at least one reader which communicates with one or more of the devices. A blocker device is operative to receive a communication directed from the reader to one or more of the RFID devices, and to generate, possibly based on information in the received communication, an output transmittable to the reader. The output simulates one or more responses from at least one of the RFID devices in a manner which prevents the reader from determining at least a portion of the identifier of at least one of the RFID devices. The blocker device may itself comprise one of the RFID devices. In an illustrative embodiment, the output generated by the blocker device interferes with the normal operation of a singulation algorithm implemented by the reader.
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Juels Ari
Rivest Ronald L.
Szydlo Michael
RSA Security Inc.
Ryan & Mason & Lewis, LLP
Yang Clara
Zimmerman Brian
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