Abstract: It is provided an authentication system, comprising: a reader for obtaining identification information assigned to an identification device held by a subject; an authentication device for authenticating the identification information obtained by the reader; a camera for photographing a facial image of the subject; and a management device which is coupled to a terminal for issuing an alarm and which includes an image database in which the facial image photographed by the camera is accumulated, in which the management device is configured to: search the image database by using information obtained by at least one of the reader and the camera on an occasion of the authentication; determine a reliability of the authentication based on a result of analyzing the retrieved facial image; and transmit data for issuing the alarm to the terminal in a case where it is determined that the reliability is low.

Abstract: It is provided an authentication system, comprising: a reader for obtaining identification information assigned to an identification device held by a subject; an authentication device for authenticating the identification information obtained by the reader; a camera for photographing a facial image of the subject; and a management device which is coupled to a terminal for issuing an alarm and which includes an image database in which the facial image photographed by the camera is accumulated, in which the management device is configured to: search the image database by using information obtained by at least one of the reader and the camera on an occasion of the authentication; determine a reliability of the authentication based on a result of analyzing the retrieved facial image; and transmit data for issuing the alarm to the terminal in a case where it is determined that the reliability is low.