Why the World Needs an International Cyberwar Convention

States’ capacity for using modern information and communication technology to inflict grave harm on enemies has been amply demonstrated in recent years, with many countries reporting large-scale cyberattacks against their military defense systems, water supply, and other critical infrastructure. Currently, no agreed-upon international rules or norms exist to govern international conflict in cyberspace. Many governments prefer to keep it that way. They argue that difficulties of verifiability and challenges posed by rapid technological change rule out agreement on an international cyber convention. Instead, they prefer to rely on informal cooperation and strategic deterrence to limit direct conflict. In this article, I seek to rebut some of the main objections to seeking an international convention on the use of cyber weapons. While there are significant obstacles to achieving effective arms control in the cyber domain, historical experience from other areas of international arms control suggests that none of these obstacles are insurmountable. Furthermore, while most critics of cyberarms control assume that cyberspace favors offensive strategies, closer inspection reveals the dominance of cyber-defensive strategies. This in turn improves prospects for striking an effective international agreement on cyberarms control.