Abstract: Disclosed is a method including a prior phase for referencing an authorized user, during which this user pronounces a reference phrase at least once, the phrase being converted into a series of reference symbols by a statistical conversion mutual to all of the users to be referenced, and an authentication test phase, including a first step during which a candidate user pronounces the reference phrase at least once, and this pronounced phrase is converted in the same manner as the reference phrase during the prior phase, by using the same conversion, into a sequence of candidate symbols, and a second step during which the series of candidate symbols is compared to the series of reference symbols to determine a comparison result, which is compared to at least one predetermined threshold, determining whether the candidate user who pronounced the phrase during the test phase is indeed the authorized user, providing authentication.