An interesting concept.
Somewhere in the back of my mind is a story real or fiction of coded messages being sent through the airways “in plain view”.
Is there a book, movie or historic event that used this premise?
Haven’t seen Casablanca in years. How did Casa Blanca (White House) get confused in the movie?
This “computer” of mine is getting “slow” with age.
In my younger days it operated much much faster and was more accurate.