Patent ID: 11943362
Assignee: nan
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 15:
16. The method of claim 12, wherein the personal information provision process comprises:
a one-time private key reception step in which the service-providing node server in the blockchain network receives the second one-time private key and a personal information request statement including the public key, the service provider information, required personal information field information, and one-time private key pair authentication information from the blockchain alternative authentication server, and receives the first one-time private key and the service provider information including service provider identification information of a service provider, an encryption key, and a reply address from the service provider server;
a service provider identification information verification step in which it is verified whether pieces of the service provider identification information of the service provider are matched, on the basis of the received service provider information and the personal information request statement;
a personal information transaction statement detection step in which when verification of the service provider identification information succeeds, the personal information transaction statement matched to the public key is detected;
an authentication step in which against the one-time private key pair authentication information, authentication is performed on whether the first one-time private key and the second one-time private key are in a pair, and when pair authentication succeeds, the second one-time private key is activated to be used as the one-time private key;
a personal information transaction statement decryption step in which the personal information transaction statement for the user terminal is decrypted with the authenticated one-time private key; and
a personal information provision step in which the personal information corresponding to the required personal information field information is extracted from the decrypted personal information transaction statement, the personal information submission including the extracted personal information corresponding to the personal information field is generated, an electronic signature of the service provider server is added, encryption is performed with the encryption key of the service provider, and a result of encryption is provided to the service provider server corresponding to the service provider identification information.