What where dealing with is a Cipher-Puzzle in my opinion. That a word is being made up possibly and this is why the "Key" cannot be forund unless you work the puzzle side of the cipher etc.
This is supported by this view:
What does this mean? There is plenty of speculation, but no clear answer. The most likely result is that the newly-discovered "Layer Two" words could be a key that (figuratively) open up some other section of the sculpture. Perhaps they will help with the unsolved part 4, or perhaps they will give insight into some other section. There are several other Kryptos-related puzzles that were placed on CIA grounds by the sculptor, which have never been satisfactorily explained. For example, it is known through reverse-engineering that one of the keys to part 1 is the word PALIMPSEST, and a key to part 2 is the word ABSCISSA, but it has never been figured out *how* someone was supposed to know to use those words -- sort of like if there was a treasure behind a padlocked door, and treasure-hunters knew what treasure was there because they'd managed to come in through a window, but they were never able to locate the hidden key that was supposed to be used to open the padlock in the first place (or even knew for sure if there had been a key for them to find). Those words "Layer Two" may help find one of the intended Kryptos keys. And if one is found, that might lead to an understanding of where to find the key to open "K4" - the still unsolved fourth part of Kryptos:
?OBKRUOXOGHULBSOLIFBBWFLRVQQPRNGKSSO TWTQSJQSSEKZZWATJKLUDIAWINFBNYP VTTMZFPKWGDKZXTJCDIGKUHUAUEKCAR