cyberterrorism

noun

1. (uncountable)The deliberate, large-scale disruption of networks of computers, especially of computers attached to the Internet, by means of viruses etc.

   “Youths from California, Michigan and Israel were also found to have discussed cyberterrorism in some chat rooms and are suspected of trying to inject a malicious computer code into the Web servers that form the communications backbone of the Internet, Mr. McLaughlin said.”