Viewing procedure management system and viewing procedure management method

A viewing procedure management system for managing a procedure for patient examination data to be viewable by a plurality of patient examination nodes as hardware, the system comprising:

• the plurality of patient examination nodes each configured to generate patient examination data based on an examination of a patient and store a plurality of data blocks in a blockchain format;
• and
• an authentication node as hardware configured to generate the plurality of data blocks to be stored into the plurality of patient examination nodes,
• the plurality of patient examination nodes and the authentication node being connected through a communication line,
• each of the plurality of patient examination nodes including
• a data block storage configured to store the plurality of data blocks in the blockchain format, and
• an examination data output unit configured to output the generated patient examination data to a database connected to the patient examination node, the database being separate from a network forming the blockchain and configured to store the patient examination data, wherein the data blocks in the blockchain format are configured to store identification information of the patient examination data while the patient examination data is maintained in the database separate from the data blocks,
• the plurality of patient examination nodes including a patient examination node being a request node as hardware configured to request viewing of the patient examination data generated by another patient examination node of the plurality of patient examination nodes and a patient examination node being a generation node as hardware configured to generate target examination data being the patient examination data requested by the request node for viewing,
• the request node including a request message transmitter configured to generate and transmit a request message requesting viewing of the target examination data to the generation node, the request message being a message including predetermined signature data with a signature of a target patient relating to the target examination data or a message to which the signature data with the signature of the target patient relating to the target examination data is attached,
• the generation node including
• a patient signature authenticator configured to authenticate, when receiving the request message, the signature of the target patient relating to the signature data received together with the request message,
• an identification information obtainer configured to obtain, when the signature of the target patient is authenticated, examination data identification information identifying the target examination data and request node identification information identifying the request node,
• a permission message generator configured to generate a permission message requesting setting of a viewing right for the request node to view the target examination data, the permission message including the examination data identification information and the request node identification information, the permission message being a message including the signature data with the signature of the target patient and signature data with a signature of the generation node or a message to which the signature data with the signature of the target patient and the signature data with the signature of the generation node are attached, and
• a permission message transmitter configured to transmit the permission message to the authentication node,
• the authentication node including
• a permission message authenticator configured to authenticate the signature of the generation node included in or attached to the permission message,
• a data block generator configured to generate a data block only after the signature of the generation node is authenticated upon receiving the permission message, the data block including no patient examination data and including the request node identification information, the examination data identification information, the signature of the target patient and the signature of the generation node as evidence of granting the viewing right of the target examination data to the request node, and
• a data block transmitter configured to transmit the generated data block to the plurality of patient examination nodes.