denial of service
Watch videos of Anonymous spokesman Topiary and Daniel Akerman Sandberg and decide for yourself if they're the same person.
Theories spread across the net that LulzSec may be having the last laugh over the arrest of the alleged hacker "Topiary" yesterday.
So, did the police arrest the right man or not?
An 18-year old man, believed to be "Topiary" of the LulzSec hacktivist gang, has been arrested by British police in the Shetland Islands, under suspicion of launching hacking attacks against a number of websites.
Computer crime authorities will be hoping that they have struck a significant blow against the Anonymous and LulzSec hacking groups, following a series of raids and arrests on both sides of the Atlantic.
Homes in Long Island and Brooklyn, New York, are raided by FBI agents searching for evidence related to a series of denial of service attacks.
Anonymous downplays significance of police action in Italy and Switzerland against alleged hacktivists.
The international investigation into the notorious LulzSec hacking gang continues, with news that FBI agents have searched a house in Hamilton, Ohio.
MasterCard's website was knocked offline following what appears to be a WikiLeaks-inspired internet attack by hacktivists against it.
Once again, a denial-of-service attack is a hactivist's best friend - but don't forget they're illegal.
The arrest of a 19-year-old man suspected of being connected with the LulzSec internet attacks against various organisations has certainly made the headlines. Graham Cluley takes a closer look at the front pages of the UK press.
UK police have arrested a man suspected of being involved in the LulzSec hacks and denial-of-service attacks.
A man who extorted money out of online gambling websites in the run-up to the 2010 Football World Cup in South Africa has been sent to jail.
The CIA's website is currently inaccessible, having apparently fallen foul of a LulzSec distributed denial-of-service (DDoS) attack.
EVE Online, Minecraft, League of Legends and Escapist Magazine all feel the pain as their websites are attacked by LulzSec.
Turkish police are reported to have detained 32 people in connection with Anonymous internet attacks on government websites.
WordPress.com, home to millions of blogs around the world, is currently being hit by an "extremely large" distributed denial-of-service (DDoS) attack.
Anonymous supporters have launched a DDoS attack against Westboro Baptist Church, the group famous for picketing military funerals with anti-gay signs.
An Anonymous "source", interviewed by a TV news programme, appears to be no stranger to internet memes when discussing arrests in the USA and UK.