Payment system using biometric data having security secured, and biometric data registration system

A payment system comprising:

• a first information processing device which stores pre-registered security data corresponding to a user or pre-registered first biometric data of the user, and accepts an operation for payment;
• and
• a second information processing device which communicates with the first information processing device and executes payment processing for the user,
• wherein
• the first information processing device is configured to:
• determine whether the first biometric data is stored in the first information processing device or not if accepting the operation for payment;
• execute first biometric authentication based on the first biometric data and second biometric data of the user accepted by the operation for payment if the first biometric data is stored in the first information processing device;
• transmit first payment data including authentication success data to the second information processing device if the first biometric authentication succeeds;
• and
• transmit second payment data including the security data and the second biometric data to the second information processing device if the first biometric data is not stored in the first information processing device, and
• the second information processing device is configured to:
• execute the payment processing based on the first payment data if receiving the first payment data;
• read third biometric data having security of the user secured from a database if receiving the second payment data;
• generate fourth biometric data having the security canceled using the security data included in the second payment data for the third biometric data;
• execute second biometric authentication based on the second biometric data included in the second payment data, and the fourth biometric data;
• and
• execute the payment processing based on the second payment data if the second biometric authentication succeeds.