## 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 in Reflector B that contains the second intermediate letter to the left by the two most significant digits taken as a ternary number, and shift the column in Reflector A that contains the first intermediate letter down by the least significant digit.
• If you are at an even step, shift the column in Reflector B that contains the second intermediate letter down by the most significant digit, and shift the row in Reflector A that contains the first intermediate letter 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 in Reflector B that contains the first intermediate letter to the left by the two most significant digits taken as a ternary number, and shift the column in Reflector A that contains the second intermediate letter down by the least significant digit.
• If you are at an even step, shift the column in Reflector B that contains the first intermediate letter down by the most significant digit, and shift the row in Reflector A that contains the second intermediate letter 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