NFC

5 Facts about NFC
NFC stands for near field communication.
NFC is a technology that is used in short distance.
Many people use NFC because it's security is outstanding.
NFC doesn't cost that much.
You don't need a dongle for NFC.

What is good about NFC tags?
It is not expensive, you can use it in about few centimetres and it's security is outstanding.

What is one weakness of NFC tags?
If you're in a bad signal NFC won't work.