(also hardware token)
A small device programmed to provide access to a physical object (e.g., a computer system, car, restricted room or area, network service, or mobile device). Instead, key fobs provide one-factor authentication to allow a user to access a device or a system without a real key. Key fobs are classed as physical security tokens (like smart cards and biometric entry fobs).
Companies may use key fobs as authentication devices in two-factor or multi-factor authentication. Their purpose is to safeguard devices, networks, applications, or data.
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