The International Herald Tribune says the United States is more concerned about North Korea’s ability to launch cyber attacks than its missile threats.

The leading daily said Monday that cyber attacks on South Korea’s banking system and television media two weeks ago were surprisingly successful, as was the North’s sinking of the South Korean naval corvette, the Cheonan, which killed 46 South Korean sailors.

The report said that the North “has never acknowledged involvement in either, though the South believes it was responsible for both, and so do U.S. experts.”

The paper pointed out that the cyber and torpedo attacks are hard to trace to North Korea and as a result, they are hard to retaliate against.

On the North’s missile threats, the paper said that the North’s missiles do not have the ability to reach U.S. territory and there is no proof that the North has succeeded in a technology to load a nuclear warhead onto a missile.