## On the Subject of the Monosodium Glutamate CM

A machine that knows no bounds when it comes to ciphers.

From the Fur Cipher module by MageMage.

Create a key using the keyword on screen 1 and the Boolean Expression on screen A. This will be referred to as Key A.

Create another key using the keyword on screen 2 and the Boolean Expression on screen B. This will be referred to as Key B.

Put 13 dashes above and below Key B, alternating between a space and a dash. If the Boolean Expression on Screen C is true, the 13 dashes above starts with a dash and the 13 dashes below starts with a space. Otherwise, do it the other way around. Replace each dash with the letters in Key A in reading order.

If the Submit Button is white, follow the instructions under Encrypt Instructions. Otherwise follow the instructions under Decrypt Instructions.

#### Encrypt Instructions

• Find the Nth letter of the encrypted word in Key B.
• Move left X letters, wrapping around to the right side. X is equal to the alphabetic position (A1Z26) of the Nth letter displayed on screen 4 (wrapping around when necessary).
• Move to the letter in Key A that is above/below the column you’re at.
• Find this letter in Key B and replace it with the letter that is above/below in Key A.
• Find that letter in Key A and move right X letters, skipping any spaces, wrapping around to the left side of that row. X is equal to the Nth digit displayed on screen 3.
• The letter you end up on becomes your Nth decrypted letter.

#### Decrypt Instructions

• Find the Nth letter of the encrypted word in Key A.
• Move left X letters in this row, skipping any spaces, wrapping around to the right side of that row. X is equal to the Nth digit on screen 3.
• Move to the Key B, staying in the same column to get a new letter. Find this letter in Key A.
• Move back to Key B again and go right X letters, wrapping around to the left side. X is equal to the alphabetic position (A1Z26) of the Nth letter displayed on screen 4 (wrapping around when necessary).
• The letter you end up on becomes your Nth decrypted letter.

#### Example 1

Encrypted Word: BJXXOJNA
Key A: HATEBCDFGIJKLMNOPQRSUVWXYZ
Key B: CARNIVLBDEFGHJKMOPQSTUWXYZ
Screen 3: 62192634
Screen C: True
Screen 4: INWARDS
Using Encrypt Rules

 H A T E B C D F G I J K L C A R N I V L B D E F G H J K M O P Q S T U W X Y Z M N O P Q R S U V W X Y Z

B, I → Y → L → E, 6 → I
J, N → Z → Z → Z, 2 → N
X, W → C → H → D, 1 → F
X, A → W → K → F, 9 → E
O, R → Y → L → E, 2 → C
J, D → E → Q → I, 6 → T
N, S → F → C → H, 3 → E
A, I → Q → I → T, 4 → D

Decrypted Word: INFECTED

Decrypted Word: INFECTED

#### Example 2

Encrypted Word: CGBXLOZ
Key A: ABCDFGHIJKMNOPQRTUVXYZSWEL
Key B: OUTWARDSBCEFGHIJKLMNPQVXYZ
Screen 3: 6219263
Screen C: False
Screen 4: CITIZEN
Using Decrypt Rules

 A B C D F G H I J K M N O O U T W A R D S B C E F G H I J K L M N P Q V X Y Z P Q R T U V X Y Z S W E L

C, 6 → K → N → X, C → O
G, 2 → D → S → M, I → U
B, 1 → A → U → B, T → T
X, 9 → W → P → O, I → C
L, 2 → W → P → O, Z → O
O, 6 → H → H → H, E → M
Z, 3 → V → E → V, N → E

Decrypted Word: OUTCOME