In addition to the riots and the embassy siege, a novel sort of attack took place: a cyber one. A flood of electronic requests designed to paralyze servers—a DDoS attack—shut down all Estonian government ministries, two banks, and several political parties, blocked all credit card transactions, and impaired the functioning of parliament. NATO and European Commission investigators could not definitively trace the attacks to Russia,43 but two years later Nashi claimed credit for the act of cyberwarfare, which the movement said had been carried out by a mass of volunteers armed with computers.44
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