Last seen: February 23, 2024 7:54 pm
Z408 has a significant Kasiski peak at width 61. Here’s a visualization of the doubles that show up when writing the cipher at that width:
Here is the breakdown of common divisors found within the widths that produced sigmas greater than or equal to one. The first number is the divisor, …
Here are the sigma plots for Z408: Widths 2-68: Widths 68-136: Widths 136-204: All widths: Here are the best widths, sorted by sigma, having a s…
So as expected out columns 1 to 4 are slightly out but out 5 and 6 are pretty close. I am using a 32bit C float is your float 64bit? if so this may ac…
I implemented a normalization step for BartW’s columnar IoC test. Let’s look at width 78. We write Z340 into 78 columns, which results in 5 rows that…
Note that the last two are very close. Here are the columnar strings I generated to compute IoC: column 1: H^Lp%*:Gz73KzF/lk#;VGO+M26UOy5B…
This evening I wrote a program to go through every column arrangement from 6 wide to 84 wide. it then calculated the IoC of each column and then when …
I am not aware of any POI associated with ACA, but I did find this page from Lyndon Lafferty’s book where he talks about ACA members Edward Steinke, H…
The "voids" (regions lacking repeating bigrams) seem interesting to me. The seemingly diagonal void in the first image can be seen as a 2 c…
All credit to Sandy and Seagull. NOTE: The name of this kid should be Schiantarelli. I think this is the thread:
As you can see there is a spike every 10 positions. However when i plotted the IoC by column width i got a surprise instead of the IoC dropping it pe…
While I’m at it, here’s what the repeating bigrams look like at period 19: Writing the cipher to 19 columns makes them a little easier to spot: …
Things line up better when you cast the cipher at width 26 (similar to what smokie did with his spreadsheets):
David there is a wrap over which i think you are missing (Pair 19 @, 281,19) Ah – thanks for pointing it out. Here is another attempt to visualize w…