 ## On the Subject of the Dual Triplex Reflector CM

Create a key using the keyword on screen 1 and the Boolean Expression on screen A. Lay the resulting key out in a 3×9 grid with a hole in the center. This will be referred to as Reflector A.

Reflector B is created by doing the same steps to create Reflector A but with the keyword on screen 2 and the Boolean Expression on screen B.

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

#### Encrypt Instructions

• Take the Nth letter of the encrypted word, find it in Reflector B, then find the letter in the same position in Reflector A. This is your 1st intermediate letter.
• Find the 1st intermediate letter in Reflector B, then find the letter in that position in Reflector A. This is your 2nd intermediate letter.
• Find the 2nd intermediate letter in Reflector B, then find the letter in that position in Reflector A. This is your Nth decrypted letter.
• Convert the Nth letter of the keyword on screen 3 into ternary.
• If you are at an odd step, shift the row the second intermediate letter was found in to the left by the two most significant digits taken as a ternary number, and shift the column the first intermediate letter was found in down by the least significant digit.
• If you are at an even step, shift the column the second intermediate letter was found in down by the most significant digit, and the row the first intermediate letter was found in to the left by the two least significant digits taken as a ternary number.
• Do not move the hole when shifting the reflectors.
• Do this for each letter of the encrypted word to get a decrypted word. Treat the keyword as if it wraps around to the front of itself.

#### Decrypt Instructions

• Take the Nth letter of the encrypted word, find it in Reflector A, then find the letter in the same position in Reflector B. This is your 1st intermediate letter.
• Find the 1st intermediate letter in Reflector A, then find the letter in that position in Reflector B. This is your 2nd intermediate letter.
• Find the 2nd intermediate letter in Reflector A, then find the letter in that position in Reflector B. This is your Nth decrypted letter.
• Convert the Nth letter of the keyword on screen 3 into ternary.
• If you are at an odd step, shift the row the first intermediate letter was found in to the left by the two most significant digits taken as a ternary number, and shift the column the second intermediate letter was found in down by the least significant digit.
• If you are at an even step, shift the column the first intermediate letter was found in down by the most significant digit, and the row the second intermediate letter was found in to the left by the two least significant digits taken as a ternary number.
• Do not move the hole when shifting the reflectors.
• Do this for each letter of the encrypted word to get a decrypted word. Treat the keyword as if it wraps around to the front of itself.

### Ternary Table

ABCDEFGHIJKLM
001002010011012020021022100101102110111
NOPQRSTUVWXYZ
112120121122200201202210211212220221222

#### Example 1

Encrypted Word: CVWX
Screen 3: BAG
Using Encrypt Rules

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

C → C → C → C
B → 002

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

V → W → C → O
A → 001

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

W → Y → Z → R
G → 021

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

X → B → A → E

Decrypted Word: CORE

#### Example 2

Encrypted Word: JUROFBO
Screen 3: JOUST
Using Decrypt Rules

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

J → P → V → C
J → 101

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

U → S → Y → O
O → 120

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

R → F → P → N
U → 210

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

O → D → I → T
S → 201

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

F → N → K → R
T → 202

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

B → Q → X → O
J → 101

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

O → T → Z → L

Decrypted Word: CONTROL