Researcher: Flaw Exposes Hack Threat

By JORDAN ROBERTSON, AP Technology Writer

Zac Franken, of England, demonstrates flaws in card access control systems during an interview with reporters at the Defcon 15 hacker convention held at the Riviera hotel-casino in Las Vegas, Saturday, Aug. 4, 2007. (AP Photo/Jae C. Hong)

(AP) -- Terrorists and other criminals could exploit a newly discovered software flaw to hijack massive computer systems used to control critical infrastructure like oil refineries, power plants and factories, a researcher said Saturday.

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