WN: Are all four of the processes known processes? There aren’t any that aren’t known, right?
Sheidt: The masking technique may not be known.
(WIRED Interview, 01/21/05)
So I guess that’s a no.
This only fuels the fire for the more random methodologists out there.
Kryptos - Beyond K4 
think BOGGLE type gaming/competetition
connections equal wording/verbage you can utilise
i BELIEVE this is appliquable
willisk
You might have to explain the concept a little more, I’m not sure I understand what you mean.