Last seen: March 26, 2026 5:07 am
Some thinking about the Z340… I am coming to terms that the "Z408 like substitution + period 19 variation" hypothesis is not working. I s…
I’m going fishing today Have fun! I ran through the Z340 with the simple transposition solver (in batch mode with 20 restarts) for each row or colum…
It is interesting to note that the phenomenon also occurs when only an incomplete column is added. UTP5 can even be seen when only the last five lines…
Cycle hill-climber + break zones heat maps: Z340: Z340 more aggressive cycle merging:
Cycle hill-climber + break zones heat maps: Z408: Z408 with random 18th column added:
So – let me check I’m following along – the heatmaps are showing symbol positions where mostly perfect 2-symbol ciphers are broken (i.e. if a cycle is…
Z408 with added 18th column consisting of random symbols, does not show up on map but has more breaks:
Some newer renditions, not sure if better or worse, pretty similar in all: Z340: Z408:
The previous maps had the problem that the real sub set of cycles is lost in the other 100’s or 1000’s of cycles. I realized that I could use AZdecryp…
Test, log all unique 2-symbol cycle break positions for symbols that have a similar frequency (max -2 or +2), heat maps: Z340: Z408:
Test, log all unique 2-symbol cycle break positions, heat maps: Z340: Z408:
If we identify cycles where breaks seem to happen between lines, this could be due to a symbol in the cycle being missing due to the removed 18th colu…
Hey Jelberg, Without testing I can empirically say that something like a vigenère does not increase bigram repeats at the keyword period. Rather, it …
Though the problem with the above is that the 18th column still has to be removed to make period 20 into 19. And after adding back in the column (by m…
– 3b) Shoe-horning: a plain text with a allot of period 4 bigrams multiplied by a period 5 transposition would have bigrams at period 20, then after r…