1. A method for behavioral fingerprinting via inferred personal relation, the method being at least partially implemented by a device, the method comprising: inferring at least one indication of personal relation for at least one authorized user via at least one user-device interaction; and incorporating the at least one indication of personal relation into at least one behavioral fingerprint that is associated with the at least one authorized user, the at least one behavioral fingerprint including one or more indicators of utilization of one or more user devices by the at least one authorized user.