The invention concerns a scheme for authentication between a telematic control unit (10) for a machine for industrial usage (220), preferably a vehicle, and a core server system (40). The telematic control unit (10) is associated with a hardware identifier and comprises an identity module (14) storing an identifier of the identity module (14) and a secret key which is specific to the identifier. The core server system (40) is connected to a telecommunication server (25) of a public land mobile network, wherein the telecommunication server (25) also has access to the secret key which is specific to the identifier. The inventive authentication scheme preferably relies on an advantageous use of a unique hardware identifier of the telematic control unit.