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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

Nfc Nfc Presentation Transcript

  • NFC Overview Author: Quốc Minh Đức Since: 2008 Aug
  • Agenda
    • Introduction
    • Basic Features
    • Related Technologies
    • Applications
    • Security Aspects
  • 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,...)
  • Agenda
    • Introduction
    • Basic Features
    • Related Technologies
    • Applications
    • Security Aspects
  • 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)
  • 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 )
  • 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 .
  • 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.
  • Agenda
    • Introduction
    • Basic Features
    • Related Technologies
    • Applications
    • Security Aspects
  • 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.
  • 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.
  • 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.
  • Related technologies – Smart card
    • Contactless smart cards: the chip communicates with the card reader through RFID induction technology.
  • 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) .
  • 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 .
  • Agenda
    • Introduction
    • Basic Features
    • Related Technologies
    • Applications
    • Security Aspects
  • 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 .
  • Applications – even offline
  • Applications – primarily for cell phones
    • Nokia 6131: first NFC phone ( emulate MIFARE 4k card )
  • Applications – basic ones
  • Applications – more common
  • Applications – multipurpose
  • Agenda
    • Introduction
    • Basic Features
    • Related Technologies
    • Applications
    • Security Aspects
  • 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
  • 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 :-)
  • Bonus – NFC Forum main members