I’m not sure but I don’t think so right now.
I’ll set up the premise for you and you can decide…
Assumptions/Observations:
- It can be assumed that keywords and cipher methods are given in some manner. It wouldn’t be fun to expect us to brute force the whole thing.
- The Morse code and first three sections of copperplate have been translated.
- The keywords/methods descriptions one would expect have not been found yet.
- K1 keywords were kryptos and palimpsest. K2 keywords were kryptos and abscissa. K3 keyword was kryptos.
- It’s possible to find palimpsest, abscissa and quagmire iii jumbled in the deciphered Morse code but they are not in any discernable order. Route and enciphered shift are also retrievable.
- The Morse code letter frequency is similar to standard plaintext values so it is likely to be a transposition or other non-substituting cipher.
- The most common transpositions (and easiest to teach) are in squares or rectangles.
- There are 81 letters in the Morse code which can give either a 3×27 grid or the more likely 9×9 grid.
- The way the method would work is that we would reverse engineer the order the ciphertext (translated morse code) would be pulled off the table and then examine the newly filled table to see the order in which we could pull off a secret message.
- By using palimpsest and abscissa as a check for success, it should be possible to determine any correct orientations. Any correct orientation would have these because how else were we supposed to know the keywords? Kryptos we could guess but abscissa and palimpsest are not exactly common.
- There are two methods to solving this little problem. The first is to attempt every method of laying the ciphertext in the grid possible and hope to find the correct one. The second is to attempt to force an alignment of the known keywords (palimpsest and abscissa) and other retrieved words (like quagmire) to the phrases from the morse code.
I followed this logically and spent the past couple days trying everything I could to get it to work. Just because I failed doesn’t mean it won’t work. It would be of some benefit to try some computer work to speed up the process and increase the accuracy.
It’s a nice idea but sadly it didn’t pan out. I could get partial fits but then would not be able to get the rest of the phrases to align properly. My best success was with quagmire. I like to announce my failures in the hopes that anyone reading will be saved some time and hassle.
Kryptos - Beyond K4 
asd asd asda sda sdasd asd asd asda sda sdasd asd asd asda sda sdasd asd asd asda sda sdasd asd asd asda sda sdasd asd asd asda sda sdasd asd asd asda sda sdasd asd asd asda sda sdasd asd asd asda sda sdasd
So true…
During the civil war route ciphers were used by the North. The ciphers involved whole
words arranged on a grid. I have been wondering if this type of cipher might have
been used on the already decyphered K2 or K3 or both since the words in either K2
or K3 can be used for other purposes. A second layer of interpretation, if you will.
“YAR,” might then refer to extra words or elevated words at the top of columns
in the route cipher. A civil war cipher route cipher book is not necessary if there
is a way to do this suggested by Kryptos itself. By the way, K2 and K3 each seem
to have 75 words.
Sanborn has either honestly suggested there is an over-arching meta-message to the whole of Kryptos or is a talented self-promoter and is encouraging further mystery in the event that K4 is solved and we are all disappointed.
Your suggestion is entirely possible but it seems like it would almost depend on the cleartext of K4 to suggest further searching via cryptology or if the extra message is more philosophical. For now, K4 is hard enough for me without trying to extract more meaning out of the first 3 parts (this doesn’t preclude a different message in the Morse code though).