Cybersecurity has become central to transatlantic security. Cyberspace is now a domain of persistent conflict, where states and their proxies conduct espionage, sabotage, and coercion through cyberattacks that target governments, critical infrastructure, and the private sector, often as part of broader hybrid campaigns. This hub examines the cyber dimension of national power: cyber warfare operations and the actors behind them, the use of cyber weapons and ransomware, the defense of critical infrastructure, and the norms and deterrence measures that could make cyberspace more stable. Fellows and analysts track the threat from Russia, China, and other adversaries, assess resilience against ransomware and other attacks, and offer cybersecurity policy for governments and firms. Explore expert analysis and commentary on cybersecurity, cyber conflict, ransomware, and the protection of the digital systems societies rely on.