The invention relates to a method for enabling a controller configured for controlling devices of a first system via a first backend to control devices of a second system via a second backend. The method, performed by the second backend, includes receiving, from the first backend, location information of the controller and credentials of the controller or/and of a user of the controller, receiving, from a source trusted by the second backend, location information of the controller and credentials of the controller or/and of the user, and performing context matching to enable the controller to control the devices of the second system by comparing the location information received from the first backend with the location information received from the source trusted by the second backend and by comparing the credentials received from the first backend with the credentials received from the source trusted by the second backend.