Cyber attacks on ROK and US expand

SEOUL: A fresh wave of cyber attacks that slowed US and Republic of Korea (ROK) websites this week hit more targets on Thursday, a Web security firm said, while the ROK's spy agency has said the hacking may be linked to the Democratic People's Republic of Korea (DPRK).

The impact of the attacks, aimed so far at dozens of sites including the White House and the ROK's presidential office, was seen as negligible, experts said.

"The anticipated attack did take place, but considerable counter-measures were taken and it did act as a defense to some degree," an official at the online security firm Ahnlab said.