On the Subject of the Triple 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.

Reflector C is created by doing the same steps to create Reflector A but with the keyword on screen 3 and the Boolean Expression on screen C.

For each letter of the encrypted word, do the following:

• Take the Nth letter of the encrypted word, find it in Reflector A, and replace it with the letter that is in the same position in Reflector B.
• Find this letter in Reflector C and replace it with the letter that is diametrically opposite.
• Find this letter in Reflector B and replace it with the letter that is in the same position in Reflector A.
• Convert the Nth letter of the keyword on screen 4 into ternary.
• Shift Reflector A based on the Most Significant Digit. Shift Reflector B based on the Middle Digit. Shift Reflector C based on the Least Significant Digit.
• 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.

0	1	2
Shift each row of the reflector to the left by 1.	Shift each column of the reflector down by 1.	Swap the left and right sides of the reflector. Swap the top and bottom rows of the reflector.

A	B	C	D	E	F	G	H	I	J	K	L	M
001	002	010	011	012	020	021	022	100	101	102	110	111
N	O	P	Q	R	S	T	U	V	W	X	Y	Z
112	120	121	122	200	201	202	210	211	212	220	221	222

Example

Encrypted Word: LKGCA
Screen 4: PRY

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

L → K → U → V
P → 121

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

K → F → L → E
R → 200

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

G → Q → Z → N
Y → 221

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

C → K → B → U
P → 121

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

A → F → D → E

Decrypted Word: VENUE