By the way I found something a bit interesting perhaps. Note that the last 10 rows of the 340 have only 1 bigram repeat. Now increase the period to 3 …
O.k., but if Zodiac rearranged the plaintext somehow, he could have still encoded the rearranged plaintext with perfect cycles and they would show up …
I’m glad to see that other people are also coming up with their own measurement systems to find out things about the ciphers, it’s a very exciting thi…
daikon – excellent work. i have a question about random vs perfect cycles. you mentioned "if you use random cycles, it’s possible that by chance …
I tried running the test ciphers from this thread through my solver (that is based on simulated annealing algorithm) and noticed an interesting patter…
This was a great idea, Jarlve! I believe I found a way to identify, and even quantify somewhat, whether the homophone substitutions were sequential (i…
We use the log function on the score of the n-gram. So you could possibly try to keep your exponential system but just encapsulate the score of each c…
If you can think of any other way to score the cycles, to study the cycles to determine what Zodiac did besides cyclic homophonic substitution, or to …
I understand about the cosine relationships a little bit. I know what cosine is, but don’t see any triangle relationships with the vectors. It’s a t…
Here’s my new challenge cipher. I would say, still reasonably easy. Have fun! You got me this time, I give up. 🙂 You have a pretty high number of b…
A…..B…..A…..B…..A…..B is more likely a true cycle compared to A..B…….A………………B..A………………..B. That makes sense beca…
Jarlve has asked me to create another one of these, so I have done so. This one also has good number of bigram repeats, which suggests that the tran…
EDIT: Here is my "challenge" and I would have to call it easy. It is a text of my own writing, with a simple transposition, and homophonica…
– I thought yesterday about changing the rules of this challenge a bit. And I also want to note that my challenge cipher has remain unsolved. Ok, I’l…
would it work to use word n-grams of words he was more likely to use? you could probably eliminate a significant percentage based on an analysis of hi…