Radio-frequency identification (RFID) uses electromagnetic waves to automatically identify and locate objects and living things. An RFID system consists of a transponder, which contains an identifiable code and is embedded in or attached to an object or living thing, and a device that can read the code.
RFID systems started being used towards the end of the Second World War. Transponders and readers were installed in aircraft and tanks so that troops could identify whether a specific location or vehicle was friend or foe. Nowadays the technology is used for things like tagging animals and identifying goods.
Saskia Blank from the Ideas 2020-Team answered this question in collaboration with Oliver Küch, Marketing and PR, from the Fraunhofer Institute for Secure Information Technology has been involved in answering the question.