ONE typical morning this year, aircraft giant Boeing logged 3,722 suspicious efforts to gain access to its global computer network. At the company's cyber operations center in St. Louis, flashing computer screens warns of modern-day burglars and spies. Boeing analysts worked swiftly with company cyber sleuths at other locations to secure the network and identify would-be intruders. But tracking the hackers can be tough, even with their nine-digit Internet Protocol addresses flickering in vertical rows on the huge color monitor. "The bad guys are really good at hiding their tracks,'' observed Kevin Nikkel, a Boeing security analyst.

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