"China's goal, simply put, is to replace the U.S. as the world's leading superpower and they're using illegal methods to get there."
He speaks of "sophisticated series of computer intrusions," using spearphishing to install malware.
The attacks hit 12 countries.
Personal information extracted from 100,000 Navy personnel, Berman notes.
"You cannot remain anonymous even if you are halfway across the world," he says.