January 2008 – Senior CIA analyst Tom Donahue, speaking at a conference, publicly acknowledges that attackers have targeted power-grid computers worldwide, causing at least one widespread electrical outage.
March 2008 – The Pentagon reveals that, in 2007, computer networks operated by DOD, other federal agencies, and defense-related think tanks and contractors were targets of computer network intrusions. Although those responsible were not definitively identified, cyber security experts suspect the attacks originated in China.
August 2008 – Russian forces invade Georgia, preceded by cyberattacks on Georgian government and business websites and network infrastructure, disabling the country's Web-based communication with the outside world.
November 2008 – Unknown foreign intruders use "thumb drives," portable memory sticks, to infect DOD networks – resulting in what one Pentagon official would later call the "most significant breach of US military computers ever."
December 2008 – Joel Brenner, national counterintelligence executive, calls China's cyber militia formidable. He says the Chinese operate both through government agencies and sponsoring organizations, which mount attacks on the US in "volumes that are just staggering."
2009 – President Obama announces creation of a Cyber-security Coordinator under the National Security Council and the National Economic Council responsible for implementing cybersecurity policies and strategy.