Nfc
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Nfc

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Nfc Nfc Presentation Transcript

  • NFC Applications and Security
  • WHAT IS NFC ? NFC stands for Near Field Communication. NFC is a short-range wireless connectivity technology that provides intuitive, simple, and safe communication between electronic devices. It is a wireless communication interface with a working distance limited to about 10 cm.
  •  It works on the simple principle of inductive coupling.  When current flows through the NFC chip, a magnetic field is generated.  This field induces electricity within the second device or an NFC tag.  The second device generates a magnetic field of its own which is then detected by the first device.  It registers this RF field and decodes it.
  • NFC STANDARDS  Operates at 13.56 MHz  Can send data at a rate of 106, 212 or 424 kb per second.
  • MODES OF OPERATION READ MODE PEER-TO-PEER CARD EMULATION SIMPLY READS AN NFC TAG TWO NFC ENABLED DEVICES CAN EXCHANGE INFORMATION. PHONE CAN ACT AS A CARD TO MAKE PAYMENTS
  • PRESENT AND PROTOTYPED
  • • Make payments with a wave or a touch anywhere contactless card readers have been deployed. • Read information and “pick up” special offers and discounts from smart posters or smart billboards. • Store tickets to access transportation gates, parking garages or get into events. • Store personal information that will allow secure building access. • Take a picture and transfer it to an NFC-enabled printer or monitor. • Share business cards with other NFC-enabled phones.
  • AT PARKING METERS
  • NFC POWERING AN E-PAPER.
  • NFC RINGS
  • SECURITY • Whenever radio frequencies are involved, there's a potential security risk. • Even though NFC transmissions must take place over very short ranges, it's possible to pick up transmissions from much further away. • It's harder to detect transmissions from passive components. Even so, an eavesdropper could detect signals from about a meter away with the right equipment. • Data can be stolen or corrupted by an attacker easily By creating an RF field of the same frequency as that of the sender. By changing bits 1 to 0 or vice versa in a signal. By modulating carrier signal with a pause in the original signal.
  • SOLUTIONS • NFC specific key agreement Set of keys unique for NFC transactions This one does not require any asymmetric cryptography. Therefore reduces the computational requirements significantly • Secure Channel for NFC  Establishing a secure channel between two NFC devices is clearly the best approach to protect against eavesdropping and any kind of data modification attack.  A standard key agreement protocol like Diffie-Hellmann Elliptic Curves could be applied to establish a shared secret between two devices • Chip Modification The NFC chip can be modified to constantly check its RF field while it is transmitting data.  The power required to attack is much larger than the power of the NFC signal. Hence the chip will be able to identify an attacking signal instantly
  • CONCLUSION • NFC is not more insecure than other related technologies. It offers options for encrypting data on the application layer the same way as Wi-Fi or Bluetooth, but additionally provides safety through the requirement of very close physical proximity. • At present, the NFC technology has reached a level where commercial launch preparation can begin and should be established. • Reliability and usability of NFC applications are probably the most striking advantages of the NFC technology and therefore important keys to its success.
  • • When compared to alternative technologies, NFC offers great advantages. • It is very likely that the NFC technology will play a big role in our future everyday life.