> I suspect those saying they are certain the North Koreans are bad guys here will insist they cannot divulge how they know this (under the aegis of National Se

> I suspect those saying they are certain the North Koreans are bad guys here will insist they cannot divulge how they know this (under the aegis of National Security or some other excuse). My understanding is that the aegis of National Security isn't unwarranted sometimes. For example, if they know NK are bad guys here because one of their spies literally witnessed the laundering (as a secretary, paper-pusher, programmer, or similar) then there is no way to disclose the source. Even a "we have an eyewitness" will tip NK off to look into the people in the process (NK will be able to definitively rule out their technology being hacked, or a bug planted somewhere).