Definition
A key fob is a compact device configured to grant access to a physical object, such as a car, network service, mobile device, restricted resources, or computer system. It is programmed to provide one-factor authentication, allowing access to a system or device without a real key.
Key Fob’s Working Mechanism
- A key fob has an antenna and a short-range radio frequency identification (RDIF) chip, which is also known as a radio transmitter.
- When you press the fob key, it sends a signal to the receiver.
- The receiver also contains an RDIF tag that accepts information from the key fob.
- The receiver’s transmitter communicates with the fob, adjusting its signal to the transmitter’s frequency. If the information matches, the authorization is completed successfully.
Examples of Key Fob Uses
- Locking and unlocking doors.
- Controlling automatic windows.
- Two-factor or multi-factor authentication.
Key Fobs and Authentication
Key fobs can be used as authentication devices in two-factor or multi-factor authentication to protect devices, applications, networks, or data.