Jonathan Joseph James (December 12, 1983 – May 18, 2008) was an American hacker who was the first juvenile incarcerated for cybercrime in the United States.
American computer hacker and computer criminal who is accused of masterminding the combined credit card theft and subsequent reselling of more than 170 million card and ATM numbers from 2005 through 2007—the biggest such fraud in history.
"Gary McKinnon (born 10 February 1966) is a Scottish systems administrator and hacker who was accused in 2002 of perpetrating the "biggest military computer hack of all time," although McKinnon himself states that he was merely looking for evidence of free energy suppression and a cover-up of UFO activity and other technologies potentially useful to the public" - Wikipedia
Mathew Bevan is a British hacker from Cardiff, Wales. In 1996 he was arrested for hacking into secure U.S. government networks under the handle Kuji. At the age of 21, he hacked into the files of the Griffiss Air Force Base Research Laboratory in New York.
Vladimir Leonidovitch Levin is a Russian individual famed for his involvement in the attempt to fraudulently transfer USD 10.7 million via Citibank's computers.