US cybersecurity defences fail to thwart mock cyberattack

Critical US electronic systems have failed to withstand a simulated cyberattack. Participants in a recent cyber-warfare exercise told Reuters that the exercise highlighted problems in leadership, communications and readiness. The two-day exercise brought together 230 government agencies, private firms and other participants. Participants were split into two groups - attackers and defenders - before each developed tactics for attacking and defending critical infrastructure systems, such as those controlling banking, telecommunications and utilities.....