USER TERMINAL, AUTHENTICATION TERMINAL, REGISTRATION TERMINAL, MANAGEMENT SYSTEM AND PROGRAM

1 . A user terminal connectable to a first distributed ledger network and a second distributed ledger network, the user terminal comprising processing circuitry configured to:

generate a decentralized identifier related to a user using a verification key;

generate a registration transaction including the verification key and the decentralized identifier; and

and transmit the registration transaction to the first distributed ledger network;

generate a token transaction related to issuance of a token, the token transaction including data of the user and the decentralized identifier; and

transmit the token transaction to the second distributed ledger network.

2 . The user terminal according to claim 1 , wherein the processing circuitry is further configured to:

register the data in a storage service, and receive a registration identifier issued for managing the data from the storage service; and

generate the registration transaction further including the registration identifier.

3 . An authentication terminal connectable to a first distributed ledger network and a second distributed ledger network, the first distributed ledger network being a network in which a decentralized identifier related to a user and a verification key associated with the decentralized identifier are stored in a distributed ledger, the second distributed ledger network being a network in which a token including encrypted data related to the user is stored in a distributed ledger, the authentication terminal comprising processing circuitry configured to:

acquire the decentralized identifier, personal identification information related to the user, and a decryption key;

extract the verification key associated with the decentralized identifier by referring to the first distributed ledger network;

extract the encrypted data to be authenticated using access information to the token by referring to the second distributed ledger network;

decrypt the encrypted data using the decryption key; and

verify a signature attached to the token using the verification key, and verify decrypted data using the personal identification information.

4 . The authentication terminal according to claim 3 , wherein the processing circuitry is configured to generate a registration transaction including an identifier of an authenticating person and a verification result of the verification unit, and transmit the registration transaction to the second distributed ledger network.

5 . A registration terminal connectable to a first distributed ledger network and a second distributed ledger network, the first distributed ledger network being a network in which a decentralized identifier related to a user and a verification key associated with the decentralized identifier are stored in a distributed ledger, the second distributed ledger network being a network in which a token including encrypted data related to the user is stored in a distributed ledger, the registration terminal comprising processing circuitry configured to:

generate additional information newly associated with the decentralized identifier;

encrypt the additional information;

generate a registration transaction for associating encrypted additional information with the token;

transmit the registration transaction to the second distributed ledger network; and

transmit access information to the token associated with the additional information and a decryption key for decrypting the encrypted additional information.

6 . The registration terminal according to claim 5 , wherein

the first distributed ledger network is a decentralized blockchain network not requiring a specific administrator, and

the second distributed ledger network is a logical centralized blockchain network requiring a specific administrator.

7 - 10 . (canceled)

11 . The user terminal according to claim 1 , wherein

the first distributed ledger network is a decentralized blockchain network not requiring a specific administrator, and

the second distributed ledger network is a logical centralized blockchain network requiring a specific administrator.

12 . The authentication terminal according to claim 3 , wherein

the first distributed ledger network is a decentralized blockchain network not requiring a specific administrator, and

the second distributed ledger network is a logical centralized blockchain network requiring a specific administrator.