Abstract: A method for authorizing a financial operation is disclosed, the method comprising: receiving operation data related to a financial operation; obtaining a first biometric mathematical representation of a user; storing an operation mathematical representation representing operation data and the first biometric mathematical representation in an authorization dataset; receiving the authorization dataset; obtaining the operation mathematical representation and the first biometric mathematical representation from the received authorization dataset; receiving a capture of a second image of the user; generating a second biometric mathematical representation of a user; determining a matching score by comparing the first biometric mathematical representation and the second biometric mathematical representation; authenticating an identity of the user; obtaining the operation data from the operation mathematical representation; and authorizing the financial operation if the identity is authenticated and the operation da

Abstract: Methods are provided for generating an electronic signature, for authenticating said electronic signature, for authenticating integrity of a content signed with said electronic signature, and for authenticating an identity of a signatory who signed said electronic signature, along with systems, computer systems and computer programs suitable for performing said methods.