NATO, European governments, hit by "MiniDuke" cyberattack

The alliance said its systems had not been compromised, although it was sharing the details of the attack with NATO member states and remained vigilant. Security experts say governments and organisations such as NATO are attacked on a daily basis - although the sophistication varies wildly.

These particular attacks appeared both widespread and innovative, the private computer security firms announcing the discovery said, with one expert saying he believed a nation-state might be responsible.