International Law in Cyberspace

Thank you, Colonel Brown, for your kind invitation to speak here today at this very important conference on “the roles of cyber in national defense.” I have been an international lawyer for more than thirty years, a government lawyer practicing international law for more than a decade, and the State Department’s Legal Adviser for nearly 3ó years. While my daily workload covers many of the bread and butter issues of international law—diplomatic immunity, the law of the sea, international humanitarian law, treaty interpretation—like many of you, I find more and more of my time is spent grappling with the question of how international law applies in cyberspace