Fans of cyberwarfare (which we are, if only because we like to imagine that it looks like Battlezone) take note: following hot on the heels previous Cyber Storm I and II and Cyber ShockWave wargames, the Department of Homeland Security is sponsoring a little something called Cyber Storm III. Starting yesterday, the three-day exercise simulates more than 1,500 different types of attack, with a special emphasis on identities, trust relationships, and digital certificates.