Data processing system, data management device, ledger management device, data management program, ledger management program, and data processing method

摘要

PROBLEM TO BE SOLVED: To provide a data processing system capable of restricting access to data while making it difficult to falsify data without depending on centralization. A data processing system 1 includes a data management device 3 and a distributed ledger system 2 that is distributed and managed by a plurality of ledger management devices 20-1 to 20-N. The ledger management device manages and publishes information including data management information and / or access right management information in cooperation with other ledger management devices. In addition, based on the information disclosed by the distributed ledger system 2, it is confirmed whether or not the requester of the data request has the authority to access the data related to the data request, and the data is displayed only when the confirmation is obtained. Get and provide. [Selection diagram] Fig. 1