A semantic access control system includes a computer system having an associated memory, the memory storing a semantic network model comprising a plurality of endpoints and oriented links between the endpoints and a semantic attribute. The computer system is configured to receive a primary signal having identification data associated with a user and to process an access attempt by the user to a secured endpoint by identifying the user based on the primary signal, sending an authorization message comprising a secondary access code, receiving a secondary signal containing the secondary access code as part of an email or cell phone transmission, allowing a computer-controlled access to the secured endpoint, and inferring the semantic attribute to the user when the computer-controlled access to the secured endpoint is allowed.