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RFID Mike Treon CPSC 310
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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.
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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.
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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.
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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)
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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.
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Coding Schemes
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Collisions RFID complicates collision detection. Tags – Probabilistic & Deterministic Readers – Relinquished control
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EPC Electronic Product Code
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Advantages over Barcodes No need for line-of sight. Reprogrammable. Greater data storage. Less susceptible to damage.
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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
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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.
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Security/Privacy in the News NY Times – Car RFID Security System Cracked NY Times – Car RFID Security System Cracked Are Privacy Concerns Valid? RFID in schools under protest
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Sources http://www.smartcodecorp.com http://www.verisign.com RDIF Technology Explained RFID Systems and Security and Privacy Implications RFID Systems and Security and Privacy Implications Security and Privacy Aspects of Low-Cost Radio Frequency Identification Systems Security and Privacy Aspects of Low-Cost Radio Frequency Identification Systems
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