North Korea recently resumed its encrypted numbers broadcast, a method used in the past to send orders to spies in the South.
http://www.koreaherald.com/view.php?ud=20160731000297
well I was bit surprised when the NorKs started doing this becuase it’s so old. 40 yrs ago overseas you could pick up the Russians doing the same thing- in a way it - it you didn’t really have anything to it was almost mesmerizing but the Russians still broadcast their own set of numbers over certain Middle East countries to this day.
what a hoot!