Stories by Robert McMillan

Four South Korean journalists were booted from the Defcon hacking conference this week after conference organizers decided their story didn't quite add up.

Hoping to deal with a growing problem, Twitter has quietly introduced a feature to prevent users from posting links to malicious Web sites. But security experts say that it can be easily circumvented.

Security researchers have found some serious flaws in software that uses the SSL (Secure Sockets Layer) encryption protocol used to secure communications on the Internet.

Microsoft has been forced to issue emergency patches for its Windows operating system after researchers discovered a way to bypass a critical security mechanism in the Internet Explorer browser.

Criminals may have stolen more than half a million credit card numbers from merchant servers hosted by Networks Solutions, the Internet hosting company warned Friday.

They sometimes call national security the third rail of politics. Touch it and, politically, you're dead.

Microsoft has sued a Hong Kong seller of mobile ringtones, saying the company used phishing techniques to flood Microsoft Live Messenger users with spam messages.

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.

A blind Boston-area teenager was sentenced to more than 11 years in prison Friday for hacking into the telephone network and harassing the Verizon investigator who was building a case against him.

CIOs think of Symantec as a company that buys its way into new markets. Over the past decade the Cupertino, California, vendor has snatched up about 30 companies as it's evolved from an antivirus and tools seller to an aspiring enterprise infrastructure vendor.

A team of journalists investigating the global electronic waste business has unearthed a security problem too. In a Ghana market, they bought a computer hard drive containing sensitive documents belonging to U.S. government contractor Northrop Grumman.

Former Apple Macintosh evangelist Guy Kawasaki posts Twitter messages about a lot of different things, but the message he put up on Tuesday afternoon was really out of character.

Spammers are never far from a hot story, it seems, and in the past day they've been flooding Twitter with phoney messages about Iran and the<strong> </strong>latest iPhone 3.0 operating system.

Microsoft has taken aim at a rogue antivirus program called Internet Antivirus Pro.

Yahoo's CEO said Wednesday she was open to discussing a Microsoft acquisition, provided the deal were sweet.