Ticket issuing system, and ticket checking apparatus

A ticket issuing system comprising a processor and a storage with instructions thereon, wherein the storage stores a feature value table that stores feature value data including feature information pertaining to exemplary biometric information, and

• the instructions upon execution by the processor, cause the processor to:
• acquire user feature information pertaining to biometric information of a user of a ticket to be issued;
• identify, from among the feature value data stored in the feature value table, similar feature value data for which a similarity with the user feature information satisfies a predetermined criterion;
• issue a ticket on which authentication information that includes a ticket ID for identifying a ticket that is issued is recorded;
• and
• associate the similar feature value data with the ticket ID.

A ticket checking apparatus comprising a processor and a storage with instructions thereon, wherein the storage stores a feature value table that stores feature value data that is feature information pertaining to exemplary biometric information, and

• the instructions upon execution by the processor, cause the processor to:
• acquire biometric information of a user who uses a ticket;
• calculate user feature information with respect to the biometric information of the user;
• acquire authentication information that is recorded on the ticket;
• acquire a reference feature value data associated with authentication information by referring to the feature value table;
• determine a similarity between the user feature information and the reference feature value data;
• and
• output the result of determination according to the similarity.