hack

This is the second major web outage to hit large corporations around the globe this month.

During the 2016 race, former Democratic Senator Bill Nelson warned of a possible Russian hack.

The University of Central Florida says the social security numbers of 63,000 current and former students and faculty members were leaked in a computer network breach.

Sony Pictures is still reeling from the damage caused by the cyberattack. The company's reputation and Americans' free speech were put on the line. But experts dispute how to measure the damage.

On CNN's State of the Union, the president expanded on earlier remarks he made criticizing a decision by Sony Pictures to pull distribution of The Interview.

U.S. intelligence officials claim that North Korea was centrally involved in the hack against Sony. That's major news in the world of cyberwarfare, where nation states typically make covert attacks.