After the arrest of six key members of Lulz Security (LulzSec) thanks to the alleged help of the team’s leader Hector “Sabu” Monsegur, the Internet group Anonymous has decided to respond by hacking another security firm to post its open letter to the man who betrayed the hacker community.

NEW YORK (Reuters) – One of the world's most-wanted hackers secretly became an FBI informant last year, providing evidence that led to charges on Tuesday against five other suspected leaders of the Anonymous international hacking group. In a major blow to Anonymous, which has attacked the websites of government agencies and companies around the world, U.S

(Reuters) – The arrests of six suspected leaders of the loose-knit international hacking group Anonymous comes after a long string of cyber vandalism against major companies and government agencies around the world. Dec 2010: Anonymous' early attacks took aim at the websites of Mastercard, Visa and eBay's PayPal in retaliation for the companies' refusal to accept donations for Wikileaks, whose …

(Reuters) – Even as he urged tens of thousands of Twitter followers to rise up and attack government and law enforcement, the most wanted hacker on the planet was working for the FBI. New Yorker Hector Xavier Monsegur, 28, was exposed on Tuesday as the person behind Sabu, the colorful leader of Lulz Security, a much-feared and talented offshoot of the cyber-activist group Anonymous

The Federal Bureau of Investigation has arrested three alleged members of the hacker group Lulz Security, and charged two others with conspiracy to commit crimes. According to Fox News, which broke the story, the international takedown was made possible by none other than Hector Xavier Monsegur, better known as “Sabu,” the alleged leader of LulzSec.

A group of expert hackers who attacked governments and corporations around the globe have been arrested after its ringleader — one of the world's most-wanted computer vandals — turned against his comrades and secretly began working as an informant for the FBI months ago, authorities announced Tuesday.