Multifactor Authentication
2. State-of-the-Art and Potential MFA Sources
2.1.10. Geographical Location
Utilizing the device's and user's geographical location to validate whether access to the device/service could be granted is a special case of location-based authentication. Importantly, GPS signal could be easily jammed or considered faulty due to the propagation properties; thus, it is recommended to utilize at least two location sources, for example, GPS and wireless network cell ID. A smartphone could be used to support MFA from the location acquisition perspective.