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practice z340 construction method

PostPosted: Sun Jan 14, 2018 11:53 pm
by Jelberg
0

Re: practice z340 construction method

PostPosted: Mon Jan 15, 2018 2:50 am
by Quicktrader
I'd say well done..340 symbols, 63 homophones, 3 instead of 2 repeating trigrams (here non-overlapping), no 4-grams, some bigrams. The cipher is very similar to Z's, even harder to crack as there are no repeating double letters nor any other starting points except some bigrams and the two 3-grams. Lack of double homophones, too.

Quite sure it will not be cracked.

QT

Re: practice z340 construction method

PostPosted: Mon Jan 15, 2018 4:20 am
by Largo
Hello and welcome to the forum!

Your cipher is really good, because it resembles z340 in many ways. However, there are also some differences:

- Most bigramms are found at period 1, whereas z340 is period 19 or mirror + period 15. Both are statistically significant.
- Your cipher is not cyclical.
- There are no pivots. These are also quite significant, although it cannot be ruled out that these are random patterns.

The most important difference is the fact that your cipher is not cyclical. Therefore I have two ideas for now (unfortunately not much time at the moment, I only deal with z340 occasionally):

- It's a hoax (I don't think so, why would you do that?)
- You performed a transposition of the cipher after the substitution step. In other words: You have changed the order of the symbols, not the order of letters in plain text.

I am quite curious about how you created the cipher. Maybe I'll find out, otherwise I'll ask for a clue in the next few days.
I am looking forward to see more of your examples

Translated with http://www.DeepL.com/Translator

Re: practice z340 construction method

PostPosted: Mon Jan 15, 2018 9:59 pm
by Jelberg
0

Re: practice z340 construction method

PostPosted: Tue Jan 16, 2018 3:17 am
by Mr lowe
welcome.. not sure if you know but jarlve and smokie are taking a break from the 340, disappointing because they are brilliant, but understandable as the 340 is a nasty thing.
cheers..