System and method for verifying forgery of financial institution proof documents on basis of block chain

A system comprising:

• a user terminal configured to
• transmit a first request for a first financial institution certificate, the first financial institution certificate being issued from a first financial institution,
• receive a transaction ID and a second financial institution certificate in response to the first request, the second financial institution certificate being issued from the first financial institution and issued subsequent to the first financial institution certificate in response to the first request,
• generate a second index hash value by processing the second financial institution certificate with a hashing algorithm to create the second index hash value
• transmit a second request for determining whether the second financial institution certificate is verified, wherein the second request includes the transaction ID and the second index hash value, and configured to receive verification result in response to the second request;
• a financial institution terminal configured to
• generate a first index hash value by processing the first financial institution certificate with a hashing algorithm to create the first index hash value,
• transmit the first index hash value of the first financial institution certificate,
• receive the transaction ID in response to the first financial institution certificate, and
• transmit to the user terminal the transaction ID and the second financial institution certificate in response to the first request;
• a first blockchain server among a plurality of blockchain servers configured to receive the transaction information and store the transaction information along with the transaction ID in each of the plurality of blockchain servers in a manner such that the transaction information and transaction ID cannot be changed electronically, and configured to transmit the transaction ID;
• and
• a managing server configured to
• create the transaction information and transmit to the first blockchain server the transaction information, the transaction information including the first index hash value, wherein creating the transaction information includes generating the first index hash value by obtaining from the financial institution terminal the first index hash value,
• transmit to the financial institution terminal the transaction ID, received from the first blockchain server, and corresponding to the transaction information,
• acquire the transaction information from the first blockchain server using the transaction ID in response to the second request from user terminal,
• compare (i) the first index hash value associated with the first financial institution certificate, and (ii) a second index hash value associated with the second financial institution certificate and determining if there is a match between the first hash value and the second hash value;
• and
• provide to the user terminal the verification result generated by comparing the first index hash value and the second index hash value, the verification result including an indication that the second financial institution certificate is authentic in response to the managing server determining that the match exists, and the verification result including an indication that the second financial institution certificate is not authentic in response to the managing server determining that the match does not exist.