Registration terminal, holder terminal, method, and program

A file holder terminal which is connectable to a distributed ledger network in which a token including an identifier of a file to be processed is held,

• wherein access information to the token is described in the file to be processed,
• the file holder terminal comprising:
• one or more processors;
• and
• a storage medium having computer program instructions stored therein that, when executed by the one or more processors, perform to:
• acquire a file identifier from the token, using access information to the token described in the file to be processed, and
• determine that the file identifier of the file to be processed matches the file identifier acquired.

A file holder terminal which is connectable to a distributed ledger network in which a token including a user identifier that is an identifier of an authorized user of a file stored in a storage device is held,

• wherein access information to the token is described in a file stored in the storage device,
• the file holder terminal comprising:
• one or more processors;
• and
• a storage medium having computer program instructions stored therein that, when executed by the one or more processors, perform to:
• acquire the user identifier from the token, using access information to the token described in the file stored in the storage device, in response to a request related to acquisition of the file stored in the storage device and including an identifier of a user of a request source;
• and
• transmit a file stored in the storage device to the request source, when an identifier included in the request matches a user identifier acquired.

A method performed by a registration terminal connectable to a distributed ledger network, the method comprising:

• generating a transaction related to generation of a token to the distributed ledger network;
• transmitting the transaction to the distributed ledger network to generate the token in the distributed ledger network;
• and
• generating information in which access information to the token is set in a file to be processed;
• generating an identifier of the file to be processed;
• generating a transaction related to registration of the identifier to the token;
• and
• transmitting the transaction to the distributed ledger network to register the identifier in the token.