AUTHENTICATION DEVICE AND AUTHENTICATION METHOD

An authentification device includes an acquisition unit configured to acquire and detect a voice signal of an utterance voice of a speaker, an authentication unit configured to authenticate whether the speaker is the person himself/herself based on collation between the voice signal detected by the acquisition unit and a database, and a display interface configured to display, on a terminal device, an authentication status indicating whether the speaker is the person himself/herself based on an authentication result of the authentication unit, in which the display interface updates a display content of the authentication status of the speaker by the authentication unit every time the authentication status changes.