Last year, software packages that provided various ways of attacking websites and stealing valuable data were sold by professional hackers.
On November 9, 2010, Operation Payback took a break from attacking websites to organize.
He attacks magazines and websites that make children insecure about the way they look.
In apparent retaliation, hackers identifying themselves as from Anonymous Philippines, attacked several Malaysian websites.
Chinese hackers later responded by attacking Iranian websites and leaving messages.
A group of anonymous hackers claimed to have attacked websites and internet systems belonging to the Cambodian government in the wake of the arrest.
According to reports, a pro-Russian group of hackers attacked Lithuanian websites, disabling up to 300 of them.
But only days earlier the state broadcaster had shown footage apparently showing army-labelled software for attacking US-based websites.
Under this name, the group attacked child pornography servers and websites.
The group emerged in May 2011, and successfully attacked websites of several major corporations.