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Kevin Mitnick, described by the U.S. Department of Justice as "the most wanted computer criminal in United States history", was known as a self-styled 'poster boy' for hacking.
Famous for allegedly accessing high-profile computer systems of companies including Nokia, Fujitsu and Motorola, Mitnick became a player in a highly publicized dance and chase by authorities before being arrested in 1995.
Mitnick was convicted for breaking into the Digital Equipment Corporation's computer network and stealing software. Before that particular stunt, he was known for exploiting bus punch card systems in LA and phone phreaking.
He pleaded guilty to several charges as part of a plea bargain and served a 5-year sentence -- 8 months reportedly in solitary confinement -- before being released on parole. Today, Mitnick runs a computer security consultancy and is a public speaker and author.