Three members of the LulzSec hacking group pleaded guilty Tuesday in London.
The group gained international notoriety in 2011 for a series of intrusions against high-profile companies and government agencies
Ryan Ackroyd, 26; Jake Davis, 20; and Mustafa al-Bassam, 18, who was not named until now because of his age, all admitted their involvement in the hacking spree.
Ackroyd, who used the online alias of a 16-year-old girl named "Kayla," pleaded guilty to one count of carrying out an unauthorised act to impair the operation of a computer after he helped infiltrate companies that included Sony, Nintendo, 20th Century Fox and the Arizona Department of Public Safety.
Davis and al-Bassam pleaded guilty to launching distributed denial-of-service (DDoS) against the CIA and Serious Organised Crime Agency in Britain.
The trio is scheduled to be sentenced 14 May..
Previously, Ryan Cleary, had pleaded guilty to launching DDoS attacks against those organisations.