What’s NFC

  • NFC is a set of short-range wireless technologies, typically requiring a distance of 4 cm or less.
  • NFC operates at 13.56 MHz on ISO/IEC 18000-3 air interface and at rates ranging from 106 kbit/s to 424 kbit/s.
  • NFC always involves an initiator and a target; the initiator actively generates an RF field that can power a passive target.
  • NFC peer-to-peer communication is possible, provided both devices are powered.
  • There is no link level encryption built into NFC

On Android

  • NFC allows you to share small payloads of data between an NFC tag and an Android-powered device, or between two Android-powered devices.
  • Android framework APIs are based around a NFC Forum standard called NDEF (NFC Data Exchange Format).
  • On Android NFC is off when the screen is off (no butt sniffing)
  • No API support for card emulation

Supported Tag Technology

It is mandatory for all Android NFC devices to support the following tags:

ClassDescription
NfcAProvides access to NFC-A (ISO 14443-3A) properties and I/O operations.
NfcBProvides access to NFC-B (ISO 14443-3B) properties and I/O operations.
NfcFProvides access to NFC-F (JIS 6319-4) properties and I/O operations.
NfcVProvides access to NFC-V (ISO 15693) properties and I/O operations.
IsoDepProvides access to ISO-DEP (ISO 14443-4) properties and I/O operations.
NdefProvides access to NDEF data and operations on NFC tags that have been formatted as NDEF. Support NFC Forum Type 1, Type 2, Type 3 or Type 4 compliant tags

The following tag technologies are optionally supported:

ClassDescription
MifareClassicProvidesaccess to MIFARE Classic properties and I/O operations, if this Android device supports MIFARE.
MifareUltralightProvides access to MIFARE Ultralight properties and I/O operations, if this Android device supports MIFARE.

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