Near Field Communication (NFC) is a wireless communication with a transmission-rate of 424kBit/s for short distances. It was developed from the companies Sony and Philips. NFC has the same technology as RFID but with following differences:
NFC only work up to ten centimetres. The advantages are little energy consumption and cheap radio-transmitter. Because of the short distance the system can't be attacked like in Bluetooth (Bluejacker) or in WLAN.
The main difference against RFID is the fast connection of peer-to-peer networks. NFC finds other gadgets automatically and uses less time for the pairing than Bluetooth.
In addition, a PIN-code is often used in Bluetooth-networks. NFC works with a Master/Slave-System. Cheap passive tags can be queried by power supplied readers.