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RFID

RFID. R Bruce Miller University of California, Merced. R adio F requency ID entification. R-F-I-D (also “are-fid”) automatic identification method to store and remotely retrieve data from transponders RFID tag (transponder): contactless integrated circuit that may be read remotely.

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RFID

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  1. RFID R Bruce Miller University of California, Merced

  2. Radio Frequency IDentification • R-F-I-D (also “are-fid”) • automatic identification method to store and remotely retrieve data from transponders • RFID tag (transponder): contactless integrated circuit that may be read remotely

  3. Widely used • inventory tracking • drive through toll booths (“Fastrac”) • passports • door lock systems • car keys • … • library book management and security systems

  4. How RFID works RFID tag 2 1 reader 3 computer

  5. Library book check-out book and borrower card 2 1 scanner 3 library system 4 check-out record

  6. Library RFID • check-out and check-in • easy self-check • exit security • record of item use in library • scan when re-shelving • accurate record of overall use • “no guess” collection management

  7. Many types of systems • active or passive • long or short read range • secure or non-secure • one use or repeated use • Do not assume that functions apply to all systems

  8. Focus: library systems • 13.56 MHz • passive computer chip and antenna

  9. Laws of physics • RF signal causes inductance in antenna sufficient to power transmission from chip • passive 13.56 MHz cannot be read from more than 1 meter

  10. RFID tags on school children • elementary school – Sutter, California • ID cards for each student • readers in doorways • automatic attendance record • without parental permission

  11. Outcome • American Civil Liberties Union • Electronic Frontier Foundation • California Senator Simitian • Senate Bill 682 • would prohibit RFID for all California government operations

  12. SB 682 would prohibit RFID • card keys • “Fastrac” drive through toll systems • hospital patient tracking • library cards

  13. Why? • stalker “captures” library card ID # • uses RFID readers to track movement • false assumptions based on confusion re specific technology • presumes ability to hide many RFID readers connected to unified system • information gained is meaningless

  14. Why? • government agent “captures” library card ID number of suspect • later scans crowd at demonstration and records suspects • false assumptions based on lack of knowledge • passive 13.56 MHz has 1 meter read limit

  15. Technology paranoia • be wary of social issues • understand how technology works • be articulate in stating intended uses

  16. Library book RFID data • library system identification number • same as “bar code number” • could add author, title, etc. • would require different system, e.g., active (battery in book RFID tag)

  17. Library borrower card • library system identification number • essentially random • no personal information • easily change ID number if card is stolen

  18. Beware of “standards” • library systems typically use 13.56 MHz passive RFID • data format • checkout status on RFID server • checkout status passed to library system server • technically possible to migrate but might require substantial programming

  19. Limited RFID library use: why? • RFID tags in books • research libraries: large collections • RFID library cards • public libraries: many users • Expense means very few libraries can justify RFID library cards and books

  20. Unique opportunity • University of California, Merced • no security system • new book collection • small user base • positioned to understand • details of technology • implications of SB 682 • “expert” by default

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