Zodiackillersite.com

Posted: **Tue Dec 20, 2016 11:23 am**

Here's an old visual of mine for the period shift in smokie12, which was not intended at all.

Posted: **Wed Dec 21, 2016 1:43 pm**

Jarlve:
I have to read all those posts about period 19 again I think. Basically period 19 is the same as resizing the cipher to width 19 and read top to bottom, left to right. Is this correct? I played around a bit with that and tried some way transpositions (zigzag). This was a good opportunity to show an example of how I implement such tests with my python library (which I will make open source I think):

period_19_zigzag.jpeg

I will check what a „magic square“ is, never heard that. Sounds interesting though.
The FBI files you are talking about…where can I find them? Are they disclosed?

Posted: **Thu Dec 22, 2016 2:57 pm**

Largo wrote:Jarlve:
I have to read all those posts about period 19 again I think. Basically period 19 is the same as resizing the cipher to width 19 and read top to bottom, left to right. Is this correct? I played around a bit with that and tried some way transpositions (zigzag). This was a good opportunity to show an example of how I implement such tests with my python library (which I will make open source I think):

Yes, it is the same as columnar transposition.

Jarlve wrote:There are other transpositions which we have found that are very similar to a periodic transposition like this although it may be hard to understand why at first.

- Unkeyed columnar transposition (the period will be equal to the length of the columns)
- Diagonal transposition (the period will be equal to the length of the diagonals)
- Skytale (it is the same as in in the image though it wraps around the cipher instead of incrementing the position)
- Mr lowe's column shift (incrementally shift each column up or down, +1, +2, +3, etc)
- 2-dimensional period
- Column and row period

Largo wrote:I will check what a „magic square“ is, never heard that. Sounds interesting though.
The FBI files you are talking about…where can I find them? Are they disclosed?

It basicly can be seen as a 2-dimensional period with additional custom rules. Here are some links to various released Zodiac FBI files. Some of them are copies, which are not quite identical. The first link contains the best stuff and the magic square.

https://docs.google.com/folder/d/0Bx2Zx ... 1ZNc1pGX1k
http://www.zodiackillerciphers.com/?p=543
https://vault.fbi.gov/The%20Zodiac%20Killer
http://www.zodiackiller.com/fbi_index.html
http://www.zodiackillerfacts.com/galler ... php?cat=25

Posted: **Sat Dec 24, 2016 9:13 am**

Thanks a lot for the links Jarlve!

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