Building a new Internet to fundamentally improve cybersecurity could put at risk the very connectivity that is the Internet's greatest strength, says the head of the Pentagon agency that helped invent it. The argument for a new Internet is an "interesting" but "extremely incomplete description of the problem," Defense Advanced Research Projects Agency Director Arati Prabhakar said in an interview, "because while it is true that the Internet was built without security as a core driver, that's also true about...