The Pentagon's research and engineering directorate is advocating for a "zero trust" approach to security across many of its technology initiatives, including cyber capabilities and fifth-generation wireless networks. Lisa Porter, deputy under secretary of defense for research and engineering, said there has been a "mindset shift" regarding network security in recent years. "There is no such thing as a secure system," Porter said today during an event hosted by the Center for Strategic and International Studies in Washington. "We have...