Was Israel behind a hack on an Iranian port? “Maybe and maybe not,” says Yigal Unna.

Investigators earlier this year uncovered evidence of the hackers’ “longstanding compromises” at unnamed companies, according to a confidential memo.

Employees don't have email access, but external systems aren't affected.

Fresenius Group, a health care conglomerate that includes a major pharmaceutical firm, said the incident affected some of its production.

In energy-import-dependent Taiwan, the CPC Corp. is a high-value target.

It's the latest move by the administration to clamp down on foreign-sourced software and hardware.