A key fob is a small security device with built-in authentication used to control access to a building, vehicle, or other secure space. It typically consists of an electronic keypad or a small physical object such as a keychain. Different types of key fobs may contain an electronic chip, a barcode, or a magnetic strip that is read by a scanning device. Key fobs can be used to control access to a variety of devices, including computers, networks, or other authentication systems.
