1. A method for linking of a first characteristic of a first device and a second characteristic of a second device by a server comprising the steps of: receiving a request for triggering a linking between said first device and said second device; selecting a first linking information and a second linking information, the first linking information matching to the second linking information, sending from the server the first linking information to the first device and the second linking information to the second device, presenting by the first device the first linking information and by the second device the second linking information, entering into the first device an indication of the matching of the first linking information and the second linking information, based on the entered indication of the matching, sending to the server a matching confirmation for confirming the matching to the server, associating the first characteristic and the second characteristic based on the received matching confirmation.