Hacker Raynaldo Rivera yesterday pleaded guilty to one count of conspiracy to "intentionally cause damage without authorization to a protected computer" in a 2011 attack on Sony Pictures Entertainment.

"Rivera is 20 years old and currently lives in Arizona, but entered his plea in United States District Court in Los Angeles," We Are Legion reports. "The indictment alleges Sony’s computer systems were compromised from May to June of 2011 by members of LulzSec. Rivera allegedly used a proxy server to mask his is IP address, obtained -- along with co-conspirators -- information through an SQL injection and then distributed that information to other members of LulzSec."

"Sony Pictures representatives claim that the damages caused by the group’s malicious activities are over $600,000," writes Softpedia's Lucian Constantin. "The hacker will be sentenced on March 14, 2013. He faces a maximum of 5 years in prison with a 3-year supervised release, and a fine that could be as much as $250,000. Rivera, who lives in Tempe, Arizona, turned himself in at the end of August after authorities officially charged him for his participation in the attack that targeted Sony Pictures."

"One of Rivera's co-conspirators in the Sony Pictures breach, a 23-year-old man from Phoenix named Cody Kretsinger who used the online moniker 'Recursion,' pleaded guilty in April to one count of conspiracy and one of unauthorized impairment of a protected computer," writes Computerworld's Lucian Constantin. "Hector Xavier Monsegur, a 28-year-old hacker from New York who acted as the leader of LulzSec under the online alias of Sabu, was secretly arrested by the FBI in June 2011. He subsequently agreed to work as an FBI informant and it's believed that his collaboration with the authorities led to the arrest of other LulzSec members in the U.S. and other countries."