In Britain, four computer hackers have been sentenced to jail terms ranging from 20 months to nearly three years for carrying out cyber-attacks as part of the global network known as LulzSec. The four, who range in age from 18 to 26, pleaded guilty to attacking targets including the CIA, Sony and Rupert Murdoch’s News International. Another LulzSec hacker, Jeremy Hammond, has been jailed in the United States, where he faces a potential life sentence for allegedly hacking into the computers of the private intelligence firm Stratfor and giving the files to WikiLeaks.