Le 2022-03-01 à 12:06, kurtz le pirate a écrit :
> > Really funny !> <https://en.wikipedia.org/wiki/Steganography>> >
We see some obvious example of that in MANY movies from the 1950's to
1980's when someone use some aperture mask to reveal a hidden message in
a letter.
I've seen at least one movie where we see a character actually writing
such a message.
