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

Claim 13:
14. 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 at least one handwritten signature for document confirmation, the hash value calculated by the user device for the at least one handwritten signature for document confirmation, and the third electronic signature value by decrypting the fourth encryption data combined to the electronic file to be verified with the private key of the authentication server, calculates a hash value of at least one handwritten signature for document confirmation extracted from an electronic file to be verified, and verifies integrity of the at least one handwritten signature for document confirmation included in the electronic file to be verified by comparing the hash value extracted by decrypting the third electronic signature value with the public key of the signer, the hash value calculated by the user device for the at least one handwritten signature for document confirmation and extracted from the fourth encryption data, and the hash value calculated, by the authentication server, for the at least one handwritten signature for document confirmation extracted from the electronic file to be verified with each other.