Radio frequency identification (RFID) is a wireless communication technology that identifies specific targets and reads and writes relevant data over radio signals without identifying the mechanical or optical contact between the system and a particular target.
Radio signals are transmitted through tags that are attached to items to automatically identify and track them, by tuning them to radiofrequency electromagnetic fields. Some tags get their energy from the electromagnetic field emitted by the recognizer when they are recognized, do not need a battery, have their own power supply, and can actively send out radio waves (electromagnetic fields tuned to radio frequencies). The label contains information electronically stored and can be identified within a few meters. Unlike bar codes, RF tags do not need to be within sight of the recognizer and can also be embedded within the tracked object.
Many industries are using radio frequency identification technology. The label attached to a car in production, the factory can easily track the car on the production line progress. The warehouse can track where the medicine is. RF tags can also be attached to livestock and pets to facilitate positive identification of livestock and pets (positive identification means preventing the same status of several animals). RFID-enabled identification cards give employees access to the locked building sections and car transponders can also be used to charge toll sections and parking lots.
Some RF tags are attached to clothing, personal belongings and even to the human body. As this technology may read personal information without my permission, this technology may also have privacy infringement