LONDON (Reuters) – In turning one of its best-known hackers into an informant and breaking open the highest profile elements of the "Anonymous" movement, authorities have dealt a serious blow to a group they found a growing irritant. But as the broader "Anonymous" label – complete with its iconic Guy Fawkes mask imagery – is used by ever more disparate causes worldwide, it may be all but …

SAN FRANCISCO/NEW YORK (Reuters) – One of the people accused by U.S. authorities of being at the core of Lulz Security, perhaps the most feared hacking group on the planet, led a nonprofit group in Galway, Ireland, dedicated to making websites more secure

An Internet outlaw's decision to go to work for the FBI poured light on a secretive world where young computer experts caused havoc and where authorities say a Chicago man and others celebrated their successes as they stole hundreds of thousands of dollars with stolen credit card numbers.

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.