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Published online 23 May 2007 | Nature | doi:10.1038/news070521-8

Column

Does this mean war?

Cyber-attacks in the Baltic raise difficult questions about the threat of state-sponsored information warfare, says Philip Ball.

Is Estonia at war? Even the country's leaders don't seem sure. Over the past several weeks the Baltic nation has suffered serious attacks, but no one has been killed and it isn't even clear who the enemy is.

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