Patent ID: 11310058

Abstract:
The invention is a method for digitally signing an electronic file (48), comprising the steps carried out by a server: generating a challenge value (50) comprising a projection parameter (52), transferring the challenge value (50) to a client device through a communications channel, receiving, through a communications channel, an evidence record (70), the electronic file (48) to be signed, and a user's biometric data (54) from the client device, generating reduced biometric verification data by applying a projection utilising the projection parameter (52), generating a verification evidence record and comparing it against the evidence record (70) sent by the client device, generating a server certificate, signing the server certificate applying the server's private signing key, thereby generating a signed server certificate, generating a digital signature by associating at least the signed server certificate and the hash (49) of the electronic file (48), and associating the digital signature with the electronic file (48), thereby generating a digitally signed electronic file. The invention is further an authentication method.