What hides between Shadow and Light?

[Thomas]

Okay. Since it would be fun if someone solved this I am going to give some final hints:

- The puzzle is HARD.
- The puzzle is a sequence of hints and puzzles.
- All parts above the secret text must be solved/understood before the text can be deciphered.
- Analyzing the text alone will not give any information unless the above parts are solved and understood.
- The hints outside the puzzle (in one trailer and on website) are important leads, but not needed for solving.
- The puzzle is quite math focused, but no major knowledge is required.
- Solving the text does not solve the puzzle but takes one very close.
- Most (if not all) of the solutions to the different parts (above the text) have been touched at in the previous posts.

Last Hint: Less-safe-procedural-Vernam

These are the last hint I will give. If that is not enough then I will take the secret with me to my grave.