| 摘要 |
<p>A method for establishing a communication channel (17) between a predetermined number of selected devices (3;5). Each of the devices has its own identity. The establishing of the communication channel is done by a pairing via a server (1). Said devices have a pairing operational mode and a communication operational mode. The method comprises the steps of: - setting each of the devices in the pairing operational mode, - agreeing on the choice of a pairing signal (19a;19b), - selecting the agreed upon pairing signal (19a) on each of the devices, which devices transmit their identity and the agreed upon pairing signal (19a) to the server (1), - if the server (1) in a predetermined time interval determines that more than the predetermined number of selected devices have transmitted the agreed upon pairing signal (19a; 19b) than repeating the above second and third steps, wherein a next pairing signal is agreed upon, until the server (1) determines that only the predetermined number of selected devices have transmitted an identical sequence of pairing signals (19a;19b), - establishing the communication channel (17) between the devices by the server (1), and - setting each of the devices in the communication operational mode. The achieved communication channel is very secure. A system comprises a server (1) and a predetermined number of selected devices (3;5), wherein during use a communication channel (17) between the first device (3) and the second device (5) is established via the server (1) according to the method of the invention.</p> |
