U.S. Nuclear Plants Vulnerable to Cyber Attacks, Analysts Say

U.S. computer systems that run energy, water, nuclear and manufacturing plants are vulnerable to computer worms similar to one that infected an Iranian nuclear power facility, cyber-security analysts told a Senate panel today.

The Stuxnet malicious software, which was discovered in June, appears to have been designed professionally and took advantage of four previously unknown security breaches of Microsoft Corp.’s Windows software to infiltrate computers, the analysts said.