Relaxed, witty and charming, when you see Kevin Mitnick it's hard to imagine he was once the world's most wanted hacker. Now companies line up to have him steal secrets from them as a premier cybersecurity consultant. But it wasn't always that way. Hackers have made headlines recently with the unprecedented notoriety of collectives LulzSec and Anonymous, who select their high-profile targets - ranging from the FBI to Sony to NATO - to cause mayhem or make a political statement, in varying proportion.
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