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

Claim 15:
16. 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 hash value calculated by the user device for the electronic document received by the user device, the first electronic signature value generated by the user device for the electronic document received by the user device, and the hash value calculated by the electronic document provider for the electronic document generated by the electronic document provider by decrypting the second and fifth encryption data combined to the electronic file to be verified with the private key of the authentication server, calculates a hash value of the electronic document extracted from the electronic file to be verified, and verifies at least one of the following: non-repudiation of the electronic signature of the signer, non-repudiation of the electronic signature of the electronic document provider, consistency between the electronic document signed by the signer and the electronic document signed by the electronic document provider, and integrity of the electronic document by comparing the hash value extracted by decrypting the first electronic signature value with the public key of the signer, the hash value calculated by the user device for the electronic document received by the user device, the hash value calculated by the electronic document provider for the electronic document generated by the electronic document provider, and the hash value calculated by the authentication server for the electronic document extracted from the electronic file to be verified.