The vulnerability of governmental and financial systems to cyberattacks has prompted calls to action, though experts say the most widely proposed solutions have their own problems. On Dec. 9, 10 countries participated in a simulated cyberattack “war game” event in Israel, called “Collective Strength,” which was also attended by representatives from the World Bank, International Monetary Fund, and Bank of International Settlements. In the simulation, cyberattacks wreaked havoc on global foreign exchange and bond markets, access to liquidity, data integrity, and transactions between importers and exporters. Sensitive data appeared on the Dark Web, and the simulation also used fake news reports to add to the financial chaos and cause a run on banks. Given the many cyberattacks on large companies in recent years, the idea behind the event was to increase global co-operation in an effort to strengthen cybersecurity and lessen potential damage to financial markets and banks. Thomas Keenan, …