ENAllied leaders signed the Atlantic Charter on August 14, 1941, outlining their vision for postwar international relations that would include selfdetermination, interstate cooperation, disarmament, and a higher standard of living for all. In the Internet age, these democratic ideals have not changed. However, national security threats including crime, espionage, terrorism, and war now occur not only in physical space but also in the international domain of cyberspace, where any single government’s sovereignty and defenses are quite limited. As a consequence, many hacker tools and tactics are best countered via international collaboration in network security and law enforcement.