INFORMATION PROCESSING SYSTEM, INFORMATION PROCESSING METHOD, AND INFORMATION PROCESSING PROGRAM

摘要

A database (7) stores a first identifier generated from visitor authentication information, which is one of an encryption face picture image and key data used to generate the encryption face picture image, and visit destination authentication information, which is the other of the encryption face picture image and the key data, in association with each other. An authentication terminal device (9) receives authentication data from a mobile terminal device (2) used by a visitor (1) who tries to enter a facility, and generates a second identifier from the authentication data by the same generation process as the first identifier. A server device (6) searches a database (7) for the visit destination authentication information associated with the first identifier that coincides with the second identifier, and, when the authentication data is the visitor authentication information, acquires the visit destination authentication information associated with the first identifier that coincides with the second identifier from the database (7). The authentication terminal device (9) decrypts the visit destination authentication information acquired by the server device (6), using the authentication data as the visitor authentication information, and acquires the face picture image.