With that said--whether or not they were involved is entirely up for debate.
Having access to the internet doesn't mean you can automatically hack a multi-billion dollar company.
Few things to remember: 1. The instruments of dictatorship is working well. They are not bunch of idiots. They outlasted the Soviets! 2. NK launched a medium range ballistic missile. It was a rather crud one (basically bolted together from parts from multiple missiles). NK may be poor and a backward country but they did build and launch the rocket(although it broke up in mid flight). How many nations have actually launched rockets as NK did? 3. We all know 'hacking' isn't some rocket science. It can be done by any reasonably intelligent person with a lot of time on their hands. And NK obviously has reasonably intelligent people who have the aptitude for programming/coding/hacking with a lot of time on their hands.
NK's only internet connection is via link through China. But I can also see NK posting hacker-soldiers in China too.
1) Yes, probably. They have some sort of a cyber military organization, and it wouldn't even have to be _that_ sophisticated to pull this off. In brief see http://www.telegraph.co.uk/news/worldnews/asia/northkorea/11...
2) They're afraid of the repercussions given the massive public reaction to the hack. This isn't a fully persuasive line of reasoning, but it seems like a possibility.
3) You can see some of the evidence explained here: http://www.fbi.gov/news/pressrel/press-releases/update-on-so...
There would be no repercussions for NK admitting that they did it.
1. Does NK even have the capability to pull something like this off? They seemingly fail at every other intimidation stunt they pull off & now they have a massive success out of nowhere? Hm...
2. Why would they deny it if they did it? It's very out of character for them to not pounce on the chance of something being very embarrassing to the US.
3. With all the talk of it being so complicated to pinpoint exactly where the attacks came from, what info is the US gov using to pin this on NK (besides the very easy narrative around the context of the movie). They have to have a bit more intel than they're letting on...or something is fishy here.