US 11,917,074 B2
Electronic signature authentication system based on biometric information and electronic signature authentication method
Ki Yoong Hong, Seoul (KR); and Jong-Bin Ko, Incheon (KR)
Assigned to Secuve Co., Ltd., Seoul (KR)
Appl. No. 16/345,207
Filed by SECUVE CO., LTD., Seoul (KR)
PCT Filed Dec. 11, 2017, PCT No. PCT/KR2017/014473
§ 371(c)(1), (2) Date Oct. 14, 2021,
PCT Pub. No. WO2019/093573, PCT Pub. Date May 16, 2019.
Claims priority of application No. 10-2017-0147207 (KR), filed on Nov. 7, 2017.
Prior Publication US 2022/0038291 A1, Feb. 3, 2022
Int. Cl. H04L 9/32 (2006.01); G06F 21/64 (2013.01); H04L 9/08 (2006.01); H04L 9/40 (2022.01)
CPC H04L 9/3247 (2013.01) [G06F 21/64 (2013.01); H04L 9/0866 (2013.01); H04L 9/0894 (2013.01); H04L 9/3231 (2013.01); H04L 9/3239 (2013.01); H04L 63/0861 (2013.01)] 26 Claims
OG exemplary drawing
 
1. An electronic signature authentication system based on biometric information, comprising:
an authentication server configured to register a public key of a signer generated based on biometric information for user identification and perform authentication of an electronic document that is electronically signed with a private key of the signer generated based on the biometric information for user identification by using the public key of the signer;
an electronic document device configured to request an electronic signature for the electronic document to a user device, extract encryption data from data received from the user device, and generate a final electronic file for storage by combining the encryption data with the electronic document to transfer to the authentication server; and
the user device configured to register the biometric information for user identification of the signer and a handwritten signature for document confirmation entered from the signer, generate the public key and the private key of the signer based on the registered biometric information for user identification, register the public key of the signer to the authentication server, receive a handwritten signature for document confirmation of the signer in response to a signature request from the electronic document device, determine whether the received handwritten signature for document confirmation matches the registered handwritten signature for document confirmation, complete the input of the signature in a signature field in the electronic document to be signed, generate an electronic signature value by using the private key of the signer, and generate the encryption data by encrypting the generated electronic value.