"Yoking-Proofs" for RFID Tags

  • Authors:
  • Ari Juels

  • Affiliations:
  • -

  • Venue:
  • PERCOMW '04 Proceedings of the Second IEEE Annual Conference on Pervasive Computing and Communications Workshops
  • Year:
  • 2004

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Abstract

RFID (Radio-Frequency Identification) tags aresmall, inexpensive microchips capable of transmitting unique identifiers wirelessly over a short distance. Thanks to their utility in automating supply-chain logistics, RFID tags promise eventually to supplant theoptical barcode as a means of identifying goods.We propose the concept of a yoking-proof, namely aproof that a pair of RFID tags has been scanned simultaneously. Our particular aim is to permit tags to generatea proof that is verifiable off-line by a trusted entity, evenwhen readers are potentially untrusted. We suggest thatsuch proofs are a useful tool for maintaining integrity insupply chains, particularly as RFID data will commonlyflow across multiple, loosely affiliated organizations.