In a video posted to YouTube after last Friday's attacks in Paris, a man wearing a Guy Fawkes mask read a statement calling the attackers "vermin" and warning the Islamic State to prepare for "many cyberattacks."
Many French websites have come under attack in the days since the bloody assault on the office of the satirical newspaper Charlie Hebdo and a Jewish grocery store last week, although rumours of mass DDoS appears to be untrue.
Those wearing the cloak of the loose online hacktivist collective of Anonymous have gone after sites and promise to target Twitter and Facebook accounts of terrorists.
