Comment Cool. (Score 5, Interesting) 65
I know a guy who worked at Bletchley Park, and he said that they could never crack the luftwafe code because it was a true OTP implimentation. The pilots were literally issued a little one-time pad before flight, with letters on a grid of co-ordinates, and then instructions sent from ground ops would simply be pairs of x/y co-ordinates so the pilots could just look at the pad and see the message out. For each new message they would tear off one page and have a new arrangement of letters.