U.S. authorities would find out the origin of the widespread cyber attack coming from North Korea that overwhelmed government web sites in the U.S. and South Korea, even though it would be difficult to definitively identify the attackers quickly. The powerful attacks that targeted dozens of government and private sites underscored how the Korea and U.S. government both should prepare to block such multipronged assaults. North Korea’s cyber terrorism is a new challenge on the top of military terrorism that it will focus on developing high techniques with much advanced methodology for effective outcomes. North Korea has been caught in faint with a shocking cyber-offensive that has broad implications for the North Korea’s drive to perfect its ability to deliver weapons of mass destruction to carefully selected targets in Japan, South Korea or possibly the U.S. North Korea can ultimately stage artillery and missile attacks on major U.S. bases in South Korea with a full-scale cyber-offensive capability and even conduct its cyber attacks toward the U.S. territory.