Espionage virus prompts U.S. security alert

The U.S. Department of Homeland Security has issued a public alert after a computer virus similar to the one that attacked nuclear plants in Iran last year was discovered in European security systems.

The new virus, called Duqu, has parts that are "nearly identical" to the Stuxnet virus in Iran and appears to have been written by the same authors or other people with access to the Stuxnet source code, reported security company Symantec in a blog posting Tuesday.   More Read