I'm studying the Kryptos sculpture with its cryptographic puzzles K1 to K4.
I understand that the keyword "palimpsest" was reverse-engineered using the tableau (and brute-force computer processing), but Sanborn always said that all sections could be solved using pencil and paper.
There are theories about the Morse, but I haven't come across a good explanation of how to tease "palimpsest" out of it.
I've been frustrated trying to find this in the Kryptos Yahoo group.
I'm not concerned that it has any "meaning" just whether or not there is any other way to derive the keyword other than brute-force, from e.g. the Morse code.