The Pentagon has suffered from a cyber attack in the form of a computer virus or worm so alarming that it has taken the unprecedented step of banning the use of external hardware devices, such as flash drives and DVD's.

China is aggressively developing its power to wage cyber warfare and is now in a position to delay or disrupt the deployment of America's military forces around the world, potentially giving it the upper hand in any conflict, a panel of the US Congress has warned.

International regulation must be improved to avoid internet crime, currently estimated at $100 billion in losses annually, causing global catastrophe, some of the world's top crime experts have warned.

A draft Army intelligence report, making its way through spy circles, thinks the miniature messaging software could be used as an effective tool for coordinating militant attacks.

Four of the five main online forums that al-Qaeda's media wing uses to distribute statements by Osama bin Laden and other extremists have been disabled since mid-September, monitors of the Web sites say. At the same time, in an apparently unrelated flare-up of online sectarian hostility, Shiite and Sunni hackers have targeted Web sites associated with the other sect, including that of a Saudi-owned television network and of Iraq's most revered Shiite cleric.

U.S. intelligence officials increasingly fear that computer hackers could wreck banks and large financial institutions, or send stock markets into one more panicked frenzy, by covertly manipulating data and spreading false information.

Spam may soon spill out beyond your inbox and start slithering onto your cellphone, warns a new report from Georgia Tech Information Security Center. The report notes that the increasing computing power available in cell phones makes them more attractive targets for hackers who could stealthily turn millions of cell phones into a virtual botnet to do their bidding.

A recent U.S. military presentation hinted that the schedule for development of an electromagnetic pulse bomb has been moved up to allow for a demonstrator project sometime next year.

Computer researchers built a tool that demonstrates how hackers could silently turn Facebook users into a powerful zombie army that can attack other websites or scout for vulnerable sites on the net.

The distributed denial of service (DDOS) attacks that hit Georgian government and news websites have U.S. military officials concerned that bands of independent "cyber militias" will increasingly wield power over international relations.