Certificate issuing system based on block chain

A blockchain-based-certificate issuing system comprising:

• a user terminal comprising a processor coupled to a memory having stored thereon software instructions that, when executed by the processor, cause the processor to:
• generate a certificate public key and a certificate private key,
• transmit the certificate public key,
• receive identification information of a user, and
• transmit blockchain-based-certificate-issuance personal information, wherein the blockchain-based-certificate-issuance personal information includes the identification information of the user;
• a blockchain-based-certificate issuance request server including a first database unit having a member user identification information database, the blockchain-based-certificate issuance request server comprising a processor coupled to a memory having stored thereon software instructions that, when executed by the processor, cause the processor to:
• receive the certificate-specific public key and the blockchain-based-certificate-issuance personal information from the user terminal,
• determine whether the blockchain-based-certificate-issuance personal information matches any information within the member user identification information database,
• when the blockchain-based-certificate-issuance personal information matches any of the information within the member user identification information database, generate a key generation guidance signal and transmit the key generation guidance signal to the user terminal,
• generate user identification hash information by hashing the blockchain-based-certificate-issuance personal information,
• identify user information from the user identification hash information,
• generate a public key record transaction generation request signal by collecting user identification information, the certificate public key, and the user identification hash,
• and transmit the public key record transaction generation request signal;
• a blockchain-based-certificate management server comprising a processor coupled to a memory having stored thereon software instructions that, when executed by the processor, cause the processor to:
• receive the public key record transaction generation request signal,
• extract the user information, the certificate public key, and the user identification hash information from the public key record transaction generation request signal,
• generate public key record transaction information by collecting the certificate public key and public key record transaction ID information, wherein the public key record transaction ID information is a key value to search for the public key record transaction information,
• transmit and record the public key record transaction information,
• store the public key record transaction ID information,
• generate user verification hash information by hashing the user identification hash information and the public key record transaction ID information,
• generate user verification transaction information by collecting the user verification hash information and user verification ID information,
• transmit and record the user verification transaction information,
• store the user verification transaction ID information, and
• store the user information;
• and
• blockchain holding servers comprising a processor coupled to a memory having stored thereon software instructions that, when executed by the processor, cause the processor to:
• receive the public key record transaction information and the user verification transaction information,
• authenticate a bitcoin payment through verification of bitcoin-payment transaction information,
• identify an electronic wallet for recording the bitcoin-payment transaction information in blockchain, and
• record the public key record transaction information and the user verification transaction information in the blockchain of the electronic wallet.