On the Subject of the Inverted Magenta Cipher
The color magenta doesn't exist, it is your brain trying to make sense of your red and blue cones activating while the green is inactive. This cipher is merely a pigment of your imagination.
On the module, you will see 3 screens, a keyboard, 2 arrows, and a submit button that displays the current page you're on.
Pressing any of the arrows will only clear any letters that you have pressed since there is only 1 page for this cipher.
The top screen shows a 6 letter encrypted word, the middle screen displays a number, and the bottom screen shows a 3 letter key.
Follow the mechanics down below to decrypt your word:
Step 1: Autokey Cipher
For this, you will need the encrypted word from the top screen and the key from the bottom screen. Modify the key by adding the first 3 letters of the encrypted word to the end of the key.
Take the first letter of your encrypted word and the first letter of the key and turn them into numbers using their alphabetic positions.
Now take the sum of the 2 numbers, and then turn the new number back into a letter treating as its alphabetic position.
If the resulting number is 27 or above, subtract 26 until the number is between 1 - 26.
Repeat this for each letter to get a new encrypred word.
Encrypted Word: NYFNCM Key: OMP -> OMPNYF
N, O -> 14 + 15 -> 29 - 26 -> 3 -> C
Y, M -> 25 + 13 -> 38 - 26 -> 12 -> L
F, P -> 6 + 16 -> 22 -> V
N, N -> 14 + 14 -> 28 - 26 -> 2 -> B
C, Y -> 3 + 25 -> 28 - 26 -> 2 -> B
M, F -> 13 + 6 -> 19 -> S
New Encrypted Word: CLVBBS