Your SlideShare is downloading. ×
Nfc
Upcoming SlideShare
Loading in...5
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

×

Introducing the official SlideShare app

Stunning, full-screen experience for iPhone and Android

Text the download link to your phone

Standard text messaging rates apply

Nfc

2,157
views

Published on

Near Field Communication

Near Field Communication

Published in: Technology, Business

0 Comments
2 Likes
Statistics
Notes
  • Be the first to comment

No Downloads
Views
Total Views
2,157
On Slideshare
0
From Embeds
0
Number of Embeds
1
Actions
Shares
0
Downloads
244
Comments
0
Likes
2
Embeds 0
No embeds

Report content
Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
No notes for slide
  • 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