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Mark Abene was one of the most notorious phone hackers. His hacker
handle was Phiber
Optik. His preferred hacking activity was breaking into telephone
systems using a normal phone receiver.
Mark was a member of the Legion
of Doom hacker group, and then founded the hacker group Masters
of Deception (MOD). When the AT&T telephone system crashed
in 1990, he was blamed and raided by the Secret Service, but
later turned out be caused by a computer bug.
In December 1991, Abene was raided again, and
later indicted and
served ten months in Pennsylvania's Schuylkill Prison for his phone
hacking exploits with Southwestern Bell, New York Telephone, Pacific
Bell, US West, and Martin Marietta Electronics Information and
Missile Group. He was visited by so many journalists while in prison
that the other inmates called him "CNN".
Abene was president of Crossbar
Security until 2004.