The average large business's website sees 27 attacks per minute, though attackers--thanks to automation--can create spikes of up to seven attacks per second, or about 25,000 attacks per hour.
Those findings come from a new study, conducted by Imperva, of more than 10 million Web application attacks targeting the websites of 30 large businesses and government agencies, launched between January 2011 to May 2011. The study also assessed traffic that flowed via the onion router, better known as TOR, which helps anonymize Web traffic.

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