Computer Worm May Be Targeting Iranian Nuclear Sites

A computer worm that has infected industrial computers around the world may be part of a campaign targeting nuclear installations in Iran, computer-security researchers said.

The highest concentration of affected systems -- almost 60 percent -- is in that country, according to data from Symantec Corp., the computer-security software maker. The worm’s sophisticated programming and ability to hide itself suggest it may have been built by a government-sponsored organization in a country such as the U.S. or Israel, said Frank Rieger, technology chief at GSMK, a maker of encrypted mobile phones.