Who's behind US/Korea cyber attacks?

Is North Korea trying to hack South Korea into digital oblivion?
Is North Korea trying to hack South Korea into digital oblivion?

Does North Korea have the resources to have mounted the ongoing cyber attacks on the US and its southern neighbour?

That's the question being asked in Washington and Seoul today as the wave of distributed denial of service (DDOS) assaults continued for a fifth day.

At least 27 American and Korean official and commerical websites have been targeted in the attacks, which started on Independence Day (July 4), according to the New York Times.