Or so says Thomas Rid:
If we take the notion of war seriously, not as a metaphor, then cyber war has never happened in the past — it does not take place in the present — and it is highly unlikely that cyber war will occur in the future. Instead, all past and present political cyber attacks are merely sophisticated versions of three activities that are as old as warfare itself: subversion, espionage, and sabotage. That is improbable to change in the years ahead.
In America, especially, cyberspace is rising up the scale of national-security threats. Britain, too, is tooling up for defence (and offence) in and through cyberspace. In the rest of Europe the debate perhaps centres more on questions of data privacy. On all sides of the Atlantic, however, cybercrime is endemic. A Google News search for “cyber attack” throws up recent news of a threat by hackers to knock out the New York Stock Exchange on October 10th, a report on a new centre to defend America's critical infrastructure, speculation about the cause of the failure of Bank of America's online banking service, and demands by Congress for America to respond firmly to “predatory” cyberespionage by China.