Abstract   World leaders are beginning to look beyond temporary fixes to the challenge of securing the Internet. One possible solution may be an international arms control treaty for cyberspace. The 1997 Chemical Weapons Convention (CWC) provides national security planners with a useful model. CWC has been ratified by 98% of the world’s governments, and encompasses 95% of the world’s population. It compels signatories not to produce or to use chemical weapons (CW), and they must destroy existing CW stockpiles. As a means and method of war, CW have now almost completely lost their legitimacy. This article examines the aspects of CWC that could help to contain conflict in cyberspace. It also explores the characteristics of cyber warfare that seem to defy traditional threat mitigation.