Eventually, I'll probably port this to PreTeXt, but at the moment it is only available as PDF or, for those who want to remix, in the original L^AT_EX source.

Here is the PDF version.

And here are the files one needs to make this with L^AT_EX:

1. The actual source: owoc.tex.
2. Required additional files:
   1. all_the_animals_freq.eps
   2. by-sa.eps
   3. caesar10_all_the_animals_freq.eps
   4. CBC_decryption.eps
   5. CBC_encryption.eps
   6. ECB_decryption.eps
   7. ECB_encryption.eps
   8. owoc_cover.eps
   9. vig_all_the_animals_freq.eps
   10. refs.bib

On my machine, which is running Linux Mint "19.3 (Tricia)" and which has a quite complete suite of texlive packages (including, crucially, texlive-base and texlive-latex-base; other required L^AT_EX packages will be obvious to anyone who knows L^AT_EX when looking at the \includepackage commands in the owoc.tex source file), at the command line, I do the following in a directory containing the above files:

          latex owoc
          latex owoc
          makeindex owoc
          bibtex owoc
          latex owoc
          latex owoc
          dvips -o owoc.ps owoc
          ps2pdf owoc.ps
      

If you want just to download one archive with all of those files in it, you could use either of the following two choices:

• owocFiles.tar — a tar archive, for Linux users
• owocFiles.zip — a zip archive, for users of other operating systems