Ars Paradoxica 12: Asset - Green Code

At the end of the 12th episode, the numbers station graces us with the following:

GREEN

17 22 16 04 | 19 16 11 18 16 23 | 19 09 22 | 23 05 | 13 23 17 13 19 25 24

WEATHER: CLOUDY

Oooh! Green! A new pattern to learn! Figuring out what the new pattern is relies a bit on realizing what they've done so far.

BLUE means that it's a straightforward Vignere. A=01 on the ciphertext and the pass code

RED means that it's a Vigenere, but the cipher text is encoded with A = 26, no change to the pass code (A=01). 

So, what does green mean? GREEN turns out to be another Vigenere, but this time, while the cipher text is forward (encoded with A=01), the key is encoded backward (with A=26).

To solve this, we need to do the following: 

First, run the ciphertext with A = 01, which gives you Q V P D | S P K R P W | S I V | W E | M W Q M S Y X

Then, run the key text with A=26, which gives you 24-15-12-6-23-02. Then, run that back through to letters with an A=01 conversion, which in turn gives you XOLFWB.

Then, solve the Vigenere cipher with either the math, table, or computer approach. This means you are decoding Q V P D | S P K R P W | S I V | W E | M W Q M S Y X with XOLFWB. This gives you:

T H E Y | W O N D E R | W H Y | I T | H A P P E N S