Still investigating this fascinating puzzle. I prefer to write things out so I have included a picture. My endeavor today is to relate these two passages because I saw similarities.
I noticed that there are eleven letters in the two words given from the fourth passage “Berlin” and “clock” and two words that caught my attention in the third deciphering. “Transmitted” and “undergruund” both stuck out to me.
Now, mind you I am going about this completely based on my own methods. I do have some background in cryptology but am in no manner an expert. But it’s a fun things to try and I look forward to sharing my adventure!
So the great thing about this is that he does think differently. But I also have read many accounts and everyone is using formerly used codes. I think his, as I would do it this way, is a multilayered code. I think the fourth is combining clues, actually he said that, from the first three. That said every person who studies codes at all know what to look for first – double letters. There are only a few of those in the decoded text:
Text 1 – EE
Text 2 – TOTALLY-LL, POSSIBLE-SS, TRANSMITTED- TT, UNDERGRUUND-UU, WW, MESSAGE-SS, 2 EE-DEGREES
Text 3 – TT, EE (believe to be instructions)
I am thinking that the third passage is instructions.
Big fact: the final passage has 97 characters. “Berlin” among them and the Berlin Wall was 97 miles long.
Vigenere is what cryptologists call a polyalphabetic substitution cipher system, meaning that multiple alphabets are used to encrypt a single message. It was designed in the 16th Century, but then incorrectly attributed in the 19th century to a French cryptographer named Blaise de Vigenere (who had actually designed a different system that was more secure, called autokey). Because of the confusion, the related collection of cipher systems continue to be called “Vigenere” ciphers. For a long time, the system was considered to be unbreakable, but with modern computers, Vigenere ciphers can usually be cracked quite rapidly as long as there is a large enough amount of ciphertext to work from. For more information about Vigenere ciphers, please check here and here. (https://elonka.com/kryptos/faq.html)
The Morse Code
Jim was also fond of Morse code and include a portion with that which has been decided to this:
SOS, LUCID MEMORY, T IS YOUR POSITION, SHADOW FORCES, VIRTUALLY INVISIBLE , DIGETAL INTERPRETATU, and RQ
According to what I’ve found most recently the misspellings in IQLUSION (K1) and UNDERGRUUND (K2) are intentional (I mean duh) and when you pull those letter they should be out it gives us LO. I found LO somewhere else….