Abstract: The present invention relates to a traffic management system, a traffic management method, a computer program product, and an unmanned aerial vehicle compatible with such a system. The traffic management system comprises a millimetre wave base station having a communication mode and a radar mode, and operating in a first frequency range of 0.6 GHz-6 GHz and a second frequency range of 24 GHz-86 GHz. The system further has a control unit configured to operate the base station in the radar mode and the communication mode.

Abstract: A computer system for reading encrypted information is disclosed. A unit (24) for decrypting the information is open only as long as a display tool (A4) occupies a system-modal operative mode (SM). In this system-modal operative mode, the display tool (A4) emits, to the decrypting unit (24), a predetermined enabling signal (BS) without which the decrypting function does not work. When the display tool occupies the system-modal operative mode, the user does not have access to the user functions not defined by the display tool, thereby preventing unauthorized copying, storage and the like of the decrypted information.