Patent ID: 11868322
Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 2:
3. A content use system comprising:
a file management system,
a distributed ledger system including a distributed ledger,
a right holder terminal used by a right holder of a content piece, and
a user terminal used by a user of the content piece,
wherein the right holder terminal comprises:
a storage device configured to store file management control data in which a network identifier that identifies the file management system is associated with an identifier of a contract that is held in the distributed ledger system and corresponds to the network identifier;
a user registration unit configured to issue a user setting transaction for associating, in the contract that corresponds to the network identifier of the file management system that manages the content piece, an identifier of the content piece with connection information of the user terminal that is to use the content piece in the file management system; and
a file management control unit configured to, in response to receiving an acquisition request for acquisition of the content piece from the user terminal via the file management system, transmit the content piece to the user terminal via the file management system if connection information of the user terminal is associated with the identifier of the content piece in the contract, and

wherein the user terminal comprises:
a storage device configured to store the file management control data; and
a file management control unit configured to acquire connection information of the right holder terminal from the contract that corresponds to the network identifier of the file management system that manages the content piece, and request the content piece from the right holder terminal via the file management system.