Three Web sites belonging to the US Department of the Treasury have been hacked to attack visitors with malicious software, security vendor AVG says.

Recession has affected economic growth but worldwide people are increasingly using information and communication technology (ICT) services, such as mobile phones and the Internet, according to a newly released report by international telecommunication union.

A botnet comprised of about 50,000 infected computers has been waging a war against U.S. government Web sites and causing headaches for businesses in the U.S. and South Korea.

Federal legislation introduced in the US Senate this week would give President Obama the power to declare a cybersecurity emergency and then shut down both public and private networks including Internet traffic coming to and from compromised systems.