The Air Force Research Laboratory is testing a commercial software platform that taps mobile phones as a window onto usage of hundreds of millions of computers, routers, fitness trackers, modern automobiles and other networked devices, known collectively as the “Internet of Things.”

SignalFrame, a Washington, D.C.-based wireless technology company, has developed the capability to tap software embedded on as many as five million cellphones to determine the real-world location and identity of more than half a billion peripheral devices. The company has been telling the military its product could contribute to digital intelligence efforts that weave classified and unclassified data using machine learning and artificial intelligence…

SignalFrame has largely operated in the commercial space, but the documents reviewed by the Journal show the company has also been gunning for government business. A major investor is Razor’s Edge, a national-security-focused venture-capital firm. SignalFrame hired a former military officer to drum up business and featured its products at military exhibitions, including a “pitch day” sponsored by a technology incubator affiliated with U.S. Special Operations command in Tampa, Fla.