Usage right information processing device based on smart contract, usage right information processing system, and usage right information processing method

摘要

PROBLEM TO BE SOLVED: To provide a usage right information processing device for securely managing usage rights without using an authentication server and appropriately permitting legitimate users to use the device. A usage right information processing device uses a smart contract to perform processing related to authentication and authorization for a user to use a device to be controlled. The usage right information processing device stores authentication data that is shared with the user terminal used by the user and has a different value for each process, and the authentication data is signed on the user terminal using the private key corresponding to the user. The signature data generated by this is received from the user terminal, the public key corresponding to the private key is derived from the signature data and the authentication data using the elliptical curve digital signature algorithm, and the public key or the corresponding identification information is used. To acquire the information regarding the user's device usage right recorded in advance in association with the public key or identification information in the smart contract. [Selection diagram] FIG. 9