1. A method for recording a user's handwritten signature through a device comprising a touch-sensitive surface, said method comprising: a phase of obtaining the handwritten signature comprising at least one act of acquiring said handwritten signature on said touch-sensitive surface of said device delivering an acquired signature and at least one act of recording said acquired signature within a signature-recording space; during said phase of obtaining said handwritten signature, at least one act of measuring at least one piece of complementary data representing a position of a hand of the user through said touch sensitive surface, said hand being used for writing said signature, wherein the complementary data represents a trigonometrical position of the hand around an axis of a stylus held by a user and used for writing the handwritten signature during the act of acquiring said handwritten signature; and at least one act of recording said at least one piece of complementary data.