> The only problem being that no outside expert with the right skillset would ever travel to North Korea, and them doing so would be highly suspect.

Really? Not one person in the entire world? It doesn't even have to be voluntary - North Korea has kidnapped foreign nationals plenty of times in the past, and I find it hard to credit the assertion that there isn't a single skilled hacker in organized crime circles greedy enough to take a generous pay package from NK.

You don't even need them to travel. Have 'em Skype in.