South Korea nuclear operator strengthens security system against cyber attack

Control systems at South Korean nuclear plants have not been harmed by recent attacks by hackers, but nevertheless Korea Hydro and Nuclear Power is increasing its security efforts to defend against a possible additional attack, the company’s CEO Cho Seok told legislators on Tuesday.An investigation had found traces of a low-risk worm that had been removed from PCs and portable devices connected to the nuclear plant’s control system, but no malicious code linked to a cyber attack was found