Authentication apparatus, authentication method, and non-transitory recording medium using biometric information and knowledge information

Abstract

Provided are: performing first authentication using biometric information about an authentication target person; performing second authentication using first knowledge information indicating matters known by the authentication target person, or first possession information indicating matters had by the authentication target person; performing third authentication using second knowledge information that is different from the first knowledge information and that indicates matters known by the authentication target person, or second possession information that is different from the first possession information and that indicates matters had by the authentication target person; and performing a determination operation of determining that authentication of the target person is successful in a case where both the first authentication and the second authentication are successful, and of determining that the authentication of the target person is successful in a case where both the second authentication and the third authentication are successful even when the first authentication is not successful.