Terrorist organizations are increasingly exploiting the internet to promote extremist and violent ideologies, to radicalize individuals, to fund operations, and to otherwise support their illicit activities. At the same time, governments, international organizations, and private companies have been developing ways to fight such hostile uses of cyberspace through effective regulation. The International Cyber Terrorism Regulation Project (ICTRP) aims to facilitate deeper understanding and cooperation among key regulators dealing with this challenge in selected national and international jurisdictions.