METHOD FOR AUTHENTICATION AND SIGNATURE OF A USER IN AN APPLICATION SERVICE USING A MOBILE TELEPHONE AS A SECOND FACTOR IN ADDITION TO AND INDEPENDENTLY FROM A FIRST FACTOR

摘要

The invention relates to a method for the two-factor authentication of a user in an application service running on an application server (5). The authentication method is characterised in that the first authentication factor is a PIN authentication code known only by the user and the application service, and in that the second authentication factor is the mobile communication terminal (3) of the user on which is installed a reliability application obtained from a reliable third party or certified by the same, said reliability application being capable of generating, using said PIN identification code and a secret key (Ks) shared only with the reliable third party, a single use authentication code (OTP) for each authentication of the user in said application service.