Information processing device, information processing system, information processing method, and storage medium

An information processing method comprising:

• registering concealed biometric information on a subject concealed by a cancelable conversion key;
• performing authentication using biometric information newly acquired from the subject, the cancelable conversion key, and the registered concealed biometric information in a case where the subject has performed one or a plurality of monetary consumption activities;
• registering, in a case where the authentication is successful, consumption target information indicating a target of the consumption activity and a concealed face image obtained by concealing a face image of a consumption subject who has performed the consumption activity with an encryption key associated to the consumption subject, in association with the concealed biometric information;
• and
• authenticating the subject using biometric information on the subject recorded in advance in a storage circuit carried by the subject and newly acquired biometric information on the subject when payment related to the consumption target information is collectively performed, and presenting the consumption target information and a face image of the consumption subject unconcealed from the concealed face image by the encryption key to the subject when the authentication is successful.

A tangible and non-transitory storage medium storing a program for causing a computer of an information processing device to function as:

• a biometric information registration circuit configured to register concealed biometric information on a subject concealed by a cancelable conversion key;
• an authentication circuit configured to perform authentication using biometric information newly acquired from the subject, the cancelable conversion key, and the registered concealed biometric information in a case where the subject has performed one or a plurality of monetary consumption activities;
• a consumption target information registration circuit configured to register, in a case where the authentication is successful, consumption target information indicating a target of the consumption activity and a concealed face image obtained by concealing a face image of a consumption subject who has performed the consumption activity with an encryption key associated to the consumption subject, in association with the concealed biometric information;
• and
• a confirmation circuit configured to authenticate the subject using biometric information on the subject recorded in advance in a storage circuit carried by the subject and newly acquired biometric information on the subject when payment related to the consumption target information is collectively performed, and present the consumption target information and a face image of the consumption subject unconcealed from the concealed face image by the encryption key to the subject when the authentication is successful.