No one know who's responsible for taking out North Korea's Internet on Tuesday, but most North Koreans aren't especially concerned. They use an "Intranet" called Kwangmyong, or "Bright Star," and for them, nothing changed.
Chris Doman doesn't want to scare you, but cyber attacks are only getting worse. That's why some hackers like him are pouring their time into "network defense," trying to keep out cyber intruders that want to steal everything from credit card numbers to industrial secrets.
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