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

Claim 11:
12. The method of claim 11, wherein the alternative authentication service registration process comprises:
a service registration request step in which the user terminal accesses the blockchain alternative authentication server and transmits the blockchain alternative authentication service registration request information to the blockchain alternative authentication service for registration;
a user-identification step in which when a blockchain alternative authentication service registration request is made from the user terminal, the blockchain alternative authentication server acquires the user-identification personal information from the user terminal, makes a request to the user-identification institution server for user identification, and acquires a user-identification result value;
a user-authentication information request step in which after user identification, the blockchain alternative authentication server makes a request to the user terminal for registration of the user-authentication information;
a user-authentication information provision step in which when the request for the user-authentication information is made from the blockchain alternative authentication server, the user terminal acquires the user-authentication information from the user and transmits the user-authentication information to the blockchain alternative authentication server;
an alternative authentication key provision step in which the blockchain alternative authentication server generates the alternative authentication keys including the private key and the public key by applying the user-identification result value and any one or more among the registered user-authentication information and a token variable value, and provides the alternative authentication keys to the user terminal;
a personal information acquisition step in which the blockchain alternative authentication server acquires the personal information from the user terminal;
a personal information transaction statement registration step in which when the personal information is acquired, the blockchain alternative authentication server is configured to
select multiple nodes in which the personal information is to be stored among nodes in the blockchain network,
generate the personal information transaction statement including the personal information and encrypt the personal information transaction statement with the public key,
store the personal information transaction statement and the public key in the service-providing node servers for the selected nodes in a distributed manner, and
generate and store node transmission log information including information on the nodes storing blocks; and
a block update chain step in which the blockchain alternative authentication server performs proof of use on a fact confirmation certificate for the registered personal information transaction statement, generates new blocks, and applies a chain code hash random number to form an update chain for existing blocks stored in all the nodes.