Sony hack: U.S. unlikely to be behind North Korean Internet disruption

The President of CloudFlare, a performance and security company, has said that if North Korea's Internet disruption was an attack, it is highly unlikely that the United States was behind it.

Mathew Prince described the disruption as a disappearance of North Korea from the global map of the Internet, reported CNN.

North Korea's internet was back only on Tuesday morning after a more than nine-hour outage, said Dyn Research, a company that monitors Internet performance.

The disruption came days after the U.S. President Barack Obama said that the U.S. would "respond proportionately" to North Korean cyber attack.

The U.S. has been blaming North Korea for the hack into Sony Pictures while North Korea has been denying all charges.