Snowden leaks: GCHQ 'attacked Anonymous' hackers
Date published: 23rd February 2014
Documents from the whistle-blower published by NBC indicate UK cyberspies used a denial of service attack (DoS) in 2011 to force a chatroom used by the Anonymous collective offline.
A spokeswoman for GCHQ said all the agency's activities were authorised and subject to rigorous oversight.
But others say it raises concerns.
Dr Steven Murdoch, a security researcher at the University of Cambridge, said using a DoS attack to overwhelm a computer server with traffic would have risked disrupting other services.To continue reading click here