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Nfc

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Near Field Communication

Near Field Communication

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  • 07/22/08 Chung Khanh Duy
  • 07/22/08 Chung Khanh Duy
  • 07/22/08 Chung Khanh Duy
  • 07/22/08 Chung Khanh Duy
  • 07/22/08 Chung Khanh Duy
  • 07/22/08 Chung Khanh Duy
  • 07/22/08 Chung Khanh Duy
  • 07/22/08 Chung Khanh Duy
  • 07/22/08 Chung Khanh Duy
  • 07/22/08 Chung Khanh Duy
  • 07/22/08 Chung Khanh Duy
  • 07/22/08 Chung Khanh Duy
  • 07/22/08 Chung Khanh Duy
  • 07/22/08 Chung Khanh Duy
  • 07/22/08 Chung Khanh Duy
  • 07/22/08 Chung Khanh Duy
  • 07/22/08 Chung Khanh Duy
  • 07/22/08 Chung Khanh Duy
  • 07/22/08 Chung Khanh Duy
  • 07/22/08 Chung Khanh Duy
  • 07/22/08 Chung Khanh Duy
  • 07/22/08 Chung Khanh Duy
  • 07/22/08 Chung Khanh Duy
  • 07/22/08 Chung Khanh Duy
  • 07/22/08 Chung Khanh Duy
  • 07/22/08 Chung Khanh Duy
  • Transcript

    • 1. NFC Overview Author: Quốc Minh Đức Since: 2008 Aug
    • 2. Agenda
      • Introduction
      • Basic Features
      • Related Technologies
      • Applications
      • Security Aspects
    • 3. Introduction – what is NFC?
      • N ear F ield C ommunication
      • Short-range wireless communication technology.
      • Created by NFC Forum ( Philips, Sony, Nokia,... ) ‏
      • Standard, extends ISO-14443 (proximity card)
        • Contactless
        • Radio-frequency Identification ( RFID )
      • Primarily aimed at usage in mobile phones
        • As smart cards/readers (identification, financial, location,...)
    • 4. Agenda
      • Introduction
      • Basic Features
      • Related Technologies
      • Applications
      • Security Aspects
    • 5. Basic Features – short range wireless
      • Operating range < 20 cm
        • IrDA : max range ~ 1-5m
        • Blue-tooth : max range 10m (class 2), 100m (class 3)
      • Data-rate : 106, 212, 424 kbps (NFCIP-1) , 848, 1696 kbps (NFCIP-2) ‏
        • IrDA : 9600 baud (Serial-IR), 1.152 Mbps (Medium-IR), 4 Mbps (Fast-IR)
        • Blue-tooth : 1 Mbps (version 1.2), 3 Mbps (version 2)
    • 6. Basic Features – RFID, contactless
      • RFID : auto identification method using RF-waves
        • Operating frequency : 13.56 MHz (+/- 7 kHz)
      • “ Contactless technology” : short distance communication between devices not physically connected
      • NFC communication is triggered when two NFC-compliant devices are brought into close proximity ( good: about 1-4 cm )
    • 7. Basic Features – standardized
      • Incoporated proximity & vicinity card ( ISO-15693 ) ‏
      • ISO/IEC approved 2003 December ( ISO-18092 )
      • Later, ECMA approved NFCIP-1 ( ECMA-340 ) and NFCIP-2 ( ECMA-352 / ISO-21481)
      • NFC Forum currently about 140 members .
        • Defined a common data format : NFC Data Exchange Format .
    • 8. Basic Features – communication modes
      • Passive:
        • The Initiator device provides a carrier field (RF) and the Target device answers by modulating existing field.
        • Target device may draw power from the Initiator -provided electromagnetic field (thus called a transponder ).
      • Active:
        • Both Initiator and Target device communicate by alternately generating their own (RF) field.
        • A device deactivates its RF field while it is waiting for data.
    • 9. Agenda
      • Introduction
      • Basic Features
      • Related Technologies
      • Applications
      • Security Aspects
    • 10. Related technologies – RFID
      • RFID stands for R adio F requency ID entification
      • Auto identification system .
      • Transmits the ID of an object ( Tag ) wirelessly by radio waves (to Reader s) .
      • NFC and RFID may share same standard ( as ProximityCard - ISO14443 ) in communication .
        • But NFC operating range is much shorter than RFID range.
    • 11. Related technologies – RFID
      • RFID Tag contains at least 2 parts: IC & antenna
      • IC : stores and processes information, modulate and demodulate a (RF) signal
      • Antenna : receiving and transmitting the signal.
      • Tag classification : passive, semi-passive, active.
    • 12. Related technologies – Smart card
      • Pocket-sized card with embedded integrated circuits
      • Contact smart cards: have a small chip on the front . When inserted into a reader, the chip makes contact with electrical connectors.
    • 13. Related technologies – Smart card
      • Contactless smart cards: the chip communicates with the card reader through RFID induction technology.
    • 14. Related technologies – Contactless
      • MIFARE : the most widely installed contactless smart card, by NXP Semiconductor .
      • FeliCa : contactless smart card system, by Sony . Primarily used in electronic money cards (such as Octopus card in HongKong) .
    • 15. Related technologies – MIFARE
      • MIFARE Ultralight : has one-time-programmable ROM ‏
      • MIFARE Standard : 1k, 4k .
      • MIFARE DESFire : 2k, 4k , 8k, SAM, ...
        • Security by cryptography: DES , 3-DES , AES , ...
        • Use multi-keys and multi-sectors to enhance security
      • MIFARE Pro :
        • Dual-interface (hybrid) : contact and contactless .
    • 16. Agenda
      • Introduction
      • Basic Features
      • Related Technologies
      • Applications
      • Security Aspects
    • 17. Applications – brief usages
      • Card Emulation
        • Allows NFC-handset behave as a standard smart card . Supported by JavaME Contactless Communication API s ( JSR-257 ) .
      • Read/Write
        • Allows application transmit NFC-Forum defined messages .
      • Peer-to-peer
        • Device-to-device link level communication .
    • 18. Applications – even offline
    • 19. Applications – primarily for cell phones
      • Nokia 6131: first NFC phone ( emulate MIFARE 4k card )
    • 20. Applications – basic ones
    • 21. Applications – more common
    • 22. Applications – multipurpose
    • 23. Agenda
      • Introduction
      • Basic Features
      • Related Technologies
      • Applications
      • Security Aspects
    • 24. Security aspects
      • Despite short range, NFC alone does not ensure secure communications .
        • For security, applications have to use higher-level protocol (SSL) .
      • Eavesdropping : The RF signal for the wireless data transfer can be picked up with antennas
      • Data modification : possible, e.g. with an RFID jammer
      • Relay attack : forward request of the reader to the victim and relay back its answer to the reader in real time
    • 25. Q & A
      • References :
        • www.nfc-forum.org/specs/
        • www.gsmworld.com/documents/nfc_services_0207.pdf
        • www.ecma-international.org/publications/standards/Ecma-340.htm
        • www.ecma-international.org/publications/standards/Ecma-352.htm
        • www.crypto.rub.de/imperia/md/content/seminare/itsss07/
        • www.jcp.org/en/jsr/detail?id=257
      Thank you :-)
    • 26. Bonus – NFC Forum main members

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