The li-fi system harnesses the light spectrum rather than radio frequencies to transmit data securely. Li-fi - short for "light fidelity" - is an emerging technology first developed in Edinburgh. The term was coined by Prof Harald Haas from the University of Edinburgh, who In 2011 demonstrated how an LED bulb equipped with signal processing technology could stream a high-definition video to a computer. While radio frequencies can be "detected and targeted", its technology cannot be detected outside of its defined "cone" of coverage.
The deal with the United States Army Europe and Africa is the world's first large-scale deployment of li-fi technology, according to the company. PureLifi said its Kitefin system would be deployed by the US military in "real tactical and strategic environments"
Andrew Foreman, chief technology officer with the US Army in Europe and Africa, said: "Including optical wireless in the commander's toolbox is imperative to the survival of communications, command and control systems and, more importantly, soldiers."