Patent ID: 11917074
Assignee: SECUVE CO., LTD.
Field: Digital communication (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 14:
15. The electronic signature authentication system based on biometric information of claim 12, wherein the authentication server, in response to a verification request for the electronic document, extracts the handwritten signature for final document confirmation, the hash value of the handwritten signature for final document confirmation, and the second electronic signature value for the handwritten signature for final document confirmation by decrypting the third encryption data combined to the electronic file to be verified with the private key of the authentication server, calculates a hash value of the handwritten signature for final document confirmation extracted from the electronic file to be verified, and verifies integrity of the handwritten signature for final document confirmation included in the electronic file to be verified by comparing the hash value extracted by decrypting the second electronic signature value with the public key of the signer, the hash value calculated by the user device for the handwritten signature for final document confirmation and extracted from the third encryption data, and the hash value calculated, by the authentication server, for the handwritten signature for final document confirmation extracted from the electronic file to be verified with each other.