Information processing device, information processing method, and program recording medium

An information processing method comprising:

• acquiring biometric information;
• authenticating users by using the biometric information acquired in the acquiring, and referring to a storage for storing user information pertaining to a plurality of users and point information in association with identification information of a single point card, the user information including user identification information and user's biometric information;
• calculating an authentication rate for each of the users when authenticating the users;
• calculating, based on a calculation criteria information corresponding to the authentication rate, a point value according to a combination of the authenticated users and the authentication rate calculated for each of the users, when the authentication is successful;
• and
• adding the point value calculated to the point information stored, in association with the user identification information of the successfully authenticated users, in the storage,
• wherein the single point card is issued for the plurality of users,
• wherein the authentication rate is an index indicating likelihood of identity,
• wherein the calculation criteria information has at least two different scale factors respectively corresponding to at least two ranges of certification rates, wherein an increase in certification rate corresponds to an increase in scale factor.

A program storage medium storing a program that causes a computer to execute:

• an acquisition process of acquiring biometric information;
• an authentication process of authenticating users by using the biometric information acquired in the acquisition process, and referring to a storage for storing user information pertaining to a plurality of users and point information in association with identification information of a single point card, the user information including user identification information and user's biometric information;
• a calculation process of calculating an authentication rate for each of the users when authenticating the users;
• a calculation process of calculating, based on a calculation criteria information corresponding to the authentication rate, a point value according to a combination of the authenticated users and the authentication rate calculated for each of the users, when the authentication is successful;
• and
• an addition process of adding the point value calculated in the calculation process to the point information stored, in association with the user identification information of the successfully authenticated users, in the storage,
• wherein the single point card is issued for the plurality of users,
• wherein the authentication rate is an index indicating likelihood of identity,
• wherein the calculation criteria information has at least two different scale factors respectively corresponding to at least two ranges of certification rates, wherein an increase in certification rate corresponds to an increase in scale factor.