Systems, devices and methods for concealing radio communications and the spatial position of radio transmitters involved therein include the use of electrotechnical signal variation and dynamic, pseudo-random radio identifier. Transmitted radio signals contain radio identifiers identifying the transmitting mobile radio device. Each radio identifier is dynamically selected for each radio signal from a sequence of radio identifiers selected from a set of predefined pseudo-random sequences. The sequence is selected based on a predetermined selection rule. The radio identifier is selected from the thus selected sequence according to a predetermined deterministic update pattern associated with the selected sequence. The associated transmission power and/or transmission frequency is dynamically varied on the transmitter side according to a predetermined deterministic variation scheme.