I'm Jim. I spend time over in the Kryptos area as well. This cipher was brought to my attention by another forum member (John). Since I'd never heard of it,...
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RSN
ron.novy
Oct 15, 2010 10:55 pm
After skimming through one of Jew-Lee's files on her website I realized that the alphabet derived from the letters at the bottom of the pages is much closer to...
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Jim
sharpe_797979
Oct 27, 2010 8:30 pm
Good afternoon everyone. I've now had the opportunity to read the D'agapeyeff book, as well as spend some time with the cipher. Here's the short description...
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Jim
sharpe_797979
Oct 28, 2010 8:06 pm
Per my last post, removing the null variables (6,7,8,9,0), pairing up the remaining numbers, and breaking into two sets of 49 number pairs, yields the...
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Jim
sharpe_797979
Nov 2, 2010 5:09 pm
Recently I was able to dig a little more into the statistics behind the cipher. I tested the cipher using the Phi test to see how likely the two-digit pairs...
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Jim
sharpe_797979
Nov 15, 2010 8:21 pm
Good afternoon everyone. I enjoyed some more free time to explore the idea of D'Agapeyeff inserting nulls every other character to disguise his ciphertext. ...
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Jim
sharpe_797979
Nov 23, 2010 6:18 pm
An update for interested parties. I've continued my analysis on the ciphertext and you can read the report here: ...
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Jim
sharpe_797979
Nov 24, 2010 2:44 pm
My analysis continues on the D'Agapeyeff Cipher as a substitution plus fractionated transposition. I've now identified the 7 columns that occupied the even...
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purelyjaded
Nov 28, 2010 6:51 pm
I recently came upon this cipher and have spent the last few days turning in over in my head and investigating the transposition tactics that folks have been...
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purelyjaded
Dec 3, 2010 11:29 pm
As I said before, I went out and ordered an original copy of the book. The reason for this is that once again, I could not find what he was talking about right...
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l_combee
Dec 28, 2010 11:40 pm
... I am new to this cipher (and encryption in general), but it's interesting - certainly this cipher which encryption-wise must be a fairly straightforward...
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Jim
sharpe_797979
Dec 29, 2010 3:54 am
Thanks for taking the time to read my analysis and hypotheses. Interesting that you came up with the same row-columns and column-columns, although that's...
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plainciphertext
Dec 31, 2010 6:00 am
In D'Agapeyeff's final pages, he talks about dictionary codes. He explains a method in which Louis C.S. Mansfield decodes a dictionary code in 'The Solution of...
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Jim
sharpe_797979
Dec 31, 2010 2:50 pm
If I might make a request . . . I have an example of another 14x14 fractionated transposition cipher here in my original hypothesis. ...
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Leendert Combee
l_combee
Dec 31, 2010 5:51 pm
Thanks, I will look at this after the new year (celebrations starting soon)! I will then comment to your earlier email as well. It's interesting stuff. ...
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l_combee
Jan 4, 2011 3:47 pm
... Jim, As I wrote, my idea was that following your line of identifying which columns are likely row-columns and column-columns the next logical step is to...
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Jim
sharpe_797979
Jan 4, 2011 4:42 pm
Digraph scoring or Tetragraph scoring is the best way to assess likely plaintext. Tiago Rodrigues covers it nicely on his website dedicated to the cipher. It...
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Jim
sharpe_797979
Feb 5, 2011 1:09 am
I decided to take Leendert's analysis a step further. What I began to realize is that a fractionated cipher on a 14 x 14 grid can be broken down into 8,648,640...
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Jim Melichar
sharpe_797979
Mar 28, 2011 8:25 pm
While I'm still not finished testing the key space, I did want to put all of my theory and analysis in one spot. If you have any comments or interest in my...
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Dagapeyeff_Cipher@yah...
Mar 28, 2011 8:25 pm
Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the Dagapeyeff_Cipher group. File :...
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Jim Melichar
sharpe_797979
Apr 7, 2011 6:28 pm
I've uploaded a file with the best ~4,500 column pairings. They represent phi values 498 to 600 (the max achievable). As previously discussed, each of the key...
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tiago_f_rodrigues
tiago_f_rodr...
May 30, 2011 10:51 am
Hi, as many of you know, i've been a firm believer that d'Agapeyeff cipher is a product cipher (substituition + transposition). The difficulty in solving...
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Jim Melichar
sharpe_797979
May 31, 2011 3:43 pm
Tiago - Great to see you are still "hacking together some code". Kudos! If I may make a suggestion, it may be worth your time to cobble together a list of...
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Jim Melichar
sharpe_797979
May 31, 2011 3:57 pm
Tiago - If you are interested in my suggestion, I have provided a list of all UK cities, towns, and counties within a file in my personal directory. UK...
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tiago_f_rodrigues
tiago_f_rodr...
May 31, 2011 4:08 pm
Thank you Jim, Seems like an idea worth trying. I'll give it a go tonight and will let you know of the results. Tiago...
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tiago_f_rodrigues
tiago_f_rodr...
Jun 2, 2011 1:20 pm
Hi, i haven't had a chance to post earlier, but I'd like to let you know the cipher still stands. Using UK city names for the polybius configuration didn't...
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Jim Melichar
sharpe_797979
Jun 2, 2011 1:49 pm
Hi Tiago - Glad to hear you report back. Sorry there was no joy on the other end. I agree with you that the statistics of the "letters" in the current setup...
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Jim Melichar
sharpe_797979
Jun 2, 2011 3:07 pm
As an aside, if anyone would like to turn my experiment into a poor man's distributed computing problem I'd be happy to share the program I'm using to test,...
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Jim Melichar
sharpe_797979
Jun 9, 2011 4:14 pm
Tiago - I forgot to mention that I did do some very rough analysis around the first digits in the pair and the second digits in the pair. My results were in no...
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tiago_f_rodrigues
tiago_f_rodr...
Aug 22, 2011 3:27 pm
Dear Dagapeyeff_Cipher group members, as some of you might know, for the past 2 years I've been maintaning the dagapeyeff.com domain with some information from...
