different scenario, where a smart object S2 (i.e., reachable at an IPv6 address) in a sensor network directly provides a remote CoAP service ServiceB.Since the smart object is usually a sensor or an embedded device with limited computational and storage capabilities (and there- fore, as previously described, does not implement a complex logic like OAuth), it delegates the verification of the incoming request to the OAuth service.Since the smart object is usually a sensor or an embedded device with limited computational and storage capabilities (and there- fore, as previously described, does not implement a complex logic like OAuth), it delegates the verification of the incoming request to the OAuth service.Since all the involved entities can use the same protocol, in this case the network gateway acts only as a router without the need to translate incoming and outgoing mes- sages between the external world and the sensor network.