What is RFID?
RFID (Radio Frequency Identification) is a technology for the wireless identification of goods or persons via electromagnetic waves. RFID was used for logistics in the military as early as 1940; in the civilian sector, RFID has been used for 20 years.
An identification medium (also called a transponder) contains a microchip on which information (e.g. a serial number) is stored. Connected to the microchip is an antenna, which is responsible for wireless communication between the microchip and a reader. Identification media are available in various designs: as a card or a key fob.
In the case of passive identification media (such as anti-theft labels or company ID cards for time recording and access control), the energy for the microchip is additionally induced via the antenna. Active identification media (such as car keys with remote control) have their own battery that supplies the microchip with power.
Sometimes the term CSCT (Contactless Smar Card Technology) is also used as a synonym for RFID with personal information. The term has not yet become established.