A technique of authenticating a person involves obtaining, during a current authentication session to authenticate the person, a first authentication factor from the person and a second authentication factor from the person, at least one of the first and second authentication factors being a biometric input. The technique further involves performing an authentication operation which cross references the first authentication factor with the second authentication factor. The technique further involves outputting, as a result of the authentication operation, an authentication result signal indicating whether the authentication operation has determined the person in the current authentication session likely to be legitimate or an imposter. Such authentication, which cross references authentication factors to leverage off of their interdependency, provides stronger authentication than conventional naïve authentication.