- NFC builds on RFID which is mostly one-way; extends it into our mobile phones and smartwatches to be able to have two-way conversations with other devices
- wireless transfer of small amounts of data between devices within 4 cm of each other
- built into many phones and smartwatches, now being integrated into laptops as well
- used for:
- payment systems at stores, e.g. Apple Pay uses NFC
- payment for transportation, e.g. BART subway trains in SF
- in-person information exchange between mobile devices
- if you need to pair two Bluetooth devices
- performing authentication to a device without physically touching
- the way you use your phone or watch to pay at a store, you can use your phone or watch to authenticate to a laptop
- useful at hospital or warehouse if you use a laptop only occasionally and need to quickly authenticate
- as an access device/token/card that supports encryption and uses NFC; hold it up to a sensor and unlock an electronic door
#aplus