Cory Bennett of The Hill on the US and South Korea vowing tighter cyber cooperation in an attempt to thwart chaotic cyber attacks from North Korea:

But Pyongyang is also increasingly a cyber irritant to both the U.S. and South Korea.

North Korea was blamed for orchestrating a destructive cyberattack on Sony Pictures Entertainment last fall that wiped the film studio’s computers in retaliation for the comedy “The Interview,” which depicts the assassination of North Korean leader Kim Jong-un.

South Korea has been the target of much more threatening cyber activity from the North.

Pyongyang was reportedly responsible for the recent intrusion into the network of a South Korean state-owned nuclear power company.

While the incident wasn’t damaging, it revealed the potential of North Korea to cause significant harm through cyberspace. Seoul officials believe the ultimate goal was to create a malfunction at plant reactors.

Pyongyang is also thought to be behind a series of low-level cyberattacks[sic] on South Korean banks and media companies over the past several years.

“Our experience over the course of the conflict is showing us that when it comes to North Korea, there may be no silver bullet, but with a robust deterrence, strong pressure and well-coordinated diplomacy, we stand ready and prepared,” South Korean Foreign Minister Yun Byung-se told the press.