John Markoff

In a dimly lit chamber festooned with wires and hidden in one of California's largest data centers, Tim Pozar is changing the shape of the Internet.

The National Science Foundation and the Microsoft Corporation have agreed to offer American scientific researchers free access to the company's new cloud computing service.

The nation's escalating cyberbattles have outpaced the rush to find a deterrent, something equivalent to the cold-war-era strategy of threatening nuclear retaliation.

An American computer security researcher has found what he says he believes is strong evidence of the digital fingerprints of Chinese authors in the software programs used in attacks against Google.

The United States has begun talks with Russia and a United Nations arms control committee about strengthening Internet security and limiting military use of cyberspace.

It would have been the most far-reaching case of computer sabotage in history. In 2003, the Pentagon and American intelligence agencies made plans for a cyberattack to freeze billions of dollars in the bank accounts of Saddam Hussein and cripple his government's financial system before the United States invaded Iraq.

A group of computer scientists at the University of Washington has developed a way to make electronic messages "self destruct" after a certain period of time, like messages in sand...

The government's urgent push into cyberwarfare has set off a rush among the biggest military companies for billions of dollars in new defense contracts. The exotic nature of the work, coupled with the deep recession, is enabling the companies to attract top young talent that once would have gone to Silicon Valley.

The Internet is no longer just an essential channel for commerce, entertainment and information. It has also become a stage for state control — and rebellion against it. Computers are becoming more crucial in global conflicts, not only in spying and military action, but also in determining what information reaches people around the globe.

The United States has no clear military policy about how the nation might respond to a cyberattack on its communications, financial or power networks, a panel of scientists and policy advisers warned Wednesday, and the country needs to clarify both its offensive capabilities and how it would respond to such attacks.