Description: The modern authentication systems are analyzed. Based on the criterion of the efficiency/cost the preference is given to authentication systems. Their advantages and disadvantages have been considered. In contrast to the known solutions, was suggested the registration of voice signal by using two spaced microphones. This decision will not only realize the space-time processing, which circuit is shown, but will restore the structure of the signal which is detected with disturbance and noise signals.
Keywords: analysis, authentication, biometrics, voice, protection, identification, signal