Rising tensions between the United States and China have sparked an online tit-for-tat between hackers in both countries.

Security experts warn that terrorists are pursing 'weapons of mass disruption' that would target our critical information and transportation infrastructures.

Security experts have warned that the secure computer network planned by the US Government, "Govnet", could be undermined by careless users.

Hackers around the world have picked sides in the recent U.S. campaign against terrorism, forming hacker groups like the pro bin Laden group "GForce" or the anti-terrorist hacker group, YIHAT (Young Intelligent Hackers Against Terror). So far, the attacks have been limited to defacing webpages.