The objective is to provide a personal
authentication system that can prevent illegal personal
authentication by employing a mechanism that, when performing personal
authentication, sends
verification information of the personal authentication applicant from the authentication device to the communication terminal of the personal authentication applicant, and when the personal authentication applicant is unable to access this information, displays the transmitted
verification information of the personal authentication applicant as a
verification QR code on the applicant's communication terminal. [Solution] The personal
authentication system 1 consists of an authentication device 6 and a management
server 7. When applying for personal authentication, even if the user ID is stolen or a copy of the QR code 10 is used, confirmation transmission information is sent to the authentication applicant 3, the confirmation QR code 10 is displayed on the communication terminal 4 used by the authentication applicant 3, and the information of this confirmation QR code 10 is compared with the original confirmation transmission information sent for confirmation, thereby performing personal authentication that prevents impersonation.