A masked hacker, part of the Anonymous group, hacks the French presidential Elysee Palace website on January 20, 2012 near the eastern city of Lyon. Anonymous, which briefly knocked the FBI and Justice Department websites offline in retaliation for the US shutdown of file-sharing site Megaupload, is a shadowy group of international hackers with no central hierarchy. On the left screen, an Occupy mask is seen. AFP PHOTO / JEAN-PHILIPPE KSIAZEK (Photo credit should read JEAN-PHILIPPE KSIAZEK/AFP/Getty Images)