Electronic authentication device and method using blockchain

An authentication server, comprising:

• a communication device configured to communicate or receive a signal;
• a database configured to store user information;
• and
• a memory;
• and
• a processor electrically connected with the communication device and the memory,
• wherein the memory stores instructions which, when executed by the processor, cause the authentication server to:
• receive a request for registration of a public key from an electronic device, wherein the request includes the public key,
• in response to the request, transmit first authentication information to the electronic device through the communication device,
• receive transaction identification information from the electronic device through the communication device in response to the first authentication information,
• obtain signature data from a blockchain network using the transaction identification information,
• obtain second authentication information using the public key from the signature data,
• authenticate a user of the electronic device using the second authentication information and the first authentication information,
• map and store the public key and the user information in the database, based on a result of authenticating the user, and
• transmit a registration complete message indicating the public key is registered with the user information to the electronic device,
• wherein the transaction identification information includes information related to a node of the blockchain network where the signature data is stored by the electronic device.

A method for controlling an electronic device to process electronic authentication, the method comprising:

• generating a key pair including a public key and a private key of a user;
• transmitting a request for registration of the public key and user information to an authentication server, wherein the request includes the public key;
• receiving, in response to the request, authentication information from an authentication server;
• digitally signing the authentication information based on the private key to generate signature data;
• generating transaction data including the signature data;
• transmitting the transaction data to a blockchain network for storing the signature data in a node of the blockchain network;
• receiving transaction identification information corresponding to the transaction data from the blockchain network;
• transmitting the transaction identification information corresponding to transaction data to the authentication server;
• and
• receiving a registration complete message indicating the public key is registered with the user information included in the authentication server from the authentication server when the authentication server successfully authenticates a user of the electronic device by using the signature data stored in the node of the blockchain network.

A method for performing electronic authentication in an authentication server having user information, the method comprising:

• receiving a request for registration of a public key from an electronic device, wherein the request includes the public key;
• in response to the request, transmitting first authentication information to the electronic device;
• receiving transaction identification information from the electronic device in response to the first authentication information;
• obtaining signature data from a blockchain network using the transaction identification information;
• obtaining second authentication information using the public key from the signature data;
• authenticating a user of the electronic device using the second authentication information and the first authentication information;
• mapping and storing the public key and the user information in a database of the authentication server;
• and
• transmitting a registration complete message indicating the public key is registered with the user information to the electronic device,
• wherein the transaction identification information includes information related to a node of the blockchain network where the signature data is stored by the electronic device.