The basic idea behind RFID (radio-frequency identification) is to transmit information wirelessly over short distances. The system consists of an active part that stimulates communication and a passive part that merely responds and functions without its own power supply.
Near-field communication or near-field coupling is based on RFID technology and is characterized by a special coupling method that is standardized on separate frequency ranges. NFC is an active/active communication e.g. between cash register systems and cell phones for payment systems. RFID technology has thus been supplemented by security-relevant processes.