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Physical Multi Factor Authentication
Physical Multi Factor Authentication is an authentication method typically used in physical security in which a user is granted physical access to facilities or to specific areas only after two or more factors have been certified by the authentication system.

Opposed to multi factor authentication used in logical security, physical multi factor authentication grants physical access only when two or more factors, as for instance CCTV surveillance cameras, access control readers, perimeter intrusion detection sensors and other identification systems or devices designed for authentication, give simultaneously a positive result.

Factors
Physical authentication occurs when a person goes through an access point using specific credentials for identity certification.

In the case of an authentication attempt where at least one of the elements is missing or is manipulated, the user's identity is not certified and therefore the access to the facility is denied.

The use of multiple authentication factors in physical security aims at keeping assetes but also people secure and safe by having complete visibility and control over the flow of poeple that access or transit within their perimeter of competence in order to enhance security, safety and business operations.

The combined multiple factors used for physical authentication may include:


 * Any technology able to perfom face recognition


 * RFID readers


 * License plate recognition readers


 * QR Code readers


 * Electronic document readers for electronic identification


 * Etc.

A single person can have different credentials that will be authenticated through the multiple factors used for identification: the face, the QR Code, the RFID card, the license plate number of the vehicle, the electronic document and so on.

An example of physical multi factor authentication is the access of an authorized employee within a restriced area: only supplying the correct required credentials, respectively face for face recognition and card for RFID, will grant access to the designed area.

In order to ensure a higher level of security, multiple combinations of credentials are possible, i.e. face + license plate number, face + QR Code, license plate number + RFID card, etc.