Locked Shields is among the world’s preeminent cyber attack simulations. For two days, international teams of hackers and system admins play both sides of a war game, simultaneously attacking and defending critical infrastructure. The details are realistic, and the exercises reflect real-world geopolitics. It is a training ground for front-line operators in a rapidly evolving form of warfare in which network administrators at banks, electrical plants and government offices are as crucial to a country’s defense as uniformed troops.

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