AUTHENTICATION METHOD THAT STRENGTHENS ANONYMITY BETWEEN AN IDENTITY PROVIDER AND A SERVICE PROVIDER

摘要

The invention relates to a method for authenticating a user (U) in relation to at least one service provider (SP), said method comprising the following steps in which: the user sends (223) the service provider a first proof of knowledge (W) of a validity certificate (k) of a public key (t) associated with a secret key (y) used by an identity provider (IdP) in order to sign a first user authentication request; and the service provider verifies (225) said proof of knowledge. The invention also relates to a system for carrying out said method and to a corresponding computer program.