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This is my attempt to use all publicly available facts (not fictions), known about K4, to come a step closer to the solution of the last undeciphered message on the KRYPTOS sculpture made by Jim Sanborn.

At the moment you still need a login to view my K4 theory. I have set up a Forum for a constructive exchange of ideas. You may also be interested in my work regarding the legendary ENIGMA machine: The Enigma Message Breaking Project