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RFID

RFID. Mike Treon CPSC 310. What is RFID?. Radio Frequency Identification Wireless link to transmit data and collect stored information. (EPC) Allows for contact-less identification of people, animals, or objects. How RFID works. Readers & Tags Readers: Produce low-level magnetic field.

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RFID

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  1. RFID Mike Treon CPSC 310

  2. What is RFID? • Radio Frequency Identification • Wireless link to transmit data and collect stored information. (EPC) • Allows for contact-less identification of people, animals, or objects.

  3. How RFID works • Readers & Tags • Readers: Produce low-level magnetic field. • Tags: Antenna, Integrated Circuit (IC) • Power from magnetic field allows the card to transmit the information to the reader.

  4. More on tags • Antenna, Chip, Core, Battery. • Passive and Active Tags • Read-Only & Read-Write, WORM • Sensor Tags • Cost $.50 - $1.00, target cost is $.05.

  5. More on readers • Antenna & Electronics • Standard Interfaces • Read Range • High Frequency (850-950 MHz and 2.4-5 GHz) • Intermediate Frequency (10-15 MHz) • Low Frequency (100-500kHz)

  6. Data communication in RFID • Limited by the power and modulation/demodulation capabilities of the tags • Considerations in coding techniques • PPM or PWM to communicate from reader to tag • Manchester or NRZ to communicate from tag to reader.

  7. Coding Schemes

  8. Collisions • RFID complicates collision detection. • Tags – Probabilistic & Deterministic • Readers – Relinquished control

  9. EPC • Electronic Product Code

  10. Advantages over Barcodes • No need for line-of sight. • Reprogrammable. • Greater data storage. • Less susceptible to damage.

  11. Possible Applications • Airline baggage tracking. • Express parcels ID and tracking. • Product ID and tracking from womb to tomb. • Brand authentication. • Document tracking. • Library material handling. • Wal-Mart

  12. Security & Privacy • Unprotected tags may have vulnerabilities to eavesdropping, traffic analysis, spoofing or denial of service. • Unauthorized readers may compromise privacy by accessing tags without adequate access control.

  13. Security/Privacy in the News • NY Times – Car RFID Security System Cracked • Are Privacy Concerns Valid? • RFID in schools under protest

  14. Sources • http://www.smartcodecorp.com • http://www.verisign.com • RDIF Technology Explained • RFID Systems and Security and Privacy Implications • Security and Privacy Aspects of Low-Cost Radio Frequency Identification Systems

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