Cipher Machine

On the Subject of the AES CM

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

Write the 5 hexadecimal characters on screen 1 top to bottom. Then write the 5 hexadecimal characters on screen 2 to the right of the previous characters, top to bottom. This will be referred to as the Round Key.

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

Copy each hexadecimal character from the Round Key in reading order and turn the copies into binary to get 5 rows of 8 bit binary sequences.
Take the Nth letter’s alphabetic position, minus 1 (A0Z25) and convert it into a 5 bit binary sequence and place each bit at the end of each row with the most significant bit written at the top row.
For each row of the binary sequence: If the amount of 1s is odd, the resulting bit is a 1. Otherwise, the resulting bit is a 0.
If the Nth bit on screen 3 is a 1, invert the resulting bits.
Turn the resulting binary sequence back into a letter (A0Z25) to get your Nth decrypted letter. You can get rid of the binary sequence.
Create a new Round Key by taking the top hexadecimal pair and putting it at the bottom.
Take the new top pair of the Round Key and use it in the S-BOX Table to get a new top hexadecimal pair.
For each hexadecimal pair after the top pair, XOR it with the hexadecimal pair above it.
The resulting hexadecimal pairs become your new Round Key.

Hexadecimal to Binary

0	1	2	3	4	5	6	7
0000	0001	0010	0011	0100	0101	0110	0111
8	9	A	B	C	D	E	F
1000	1001	1010	1011	1100	1101	1110	1111

Letter to Binary

A	00000	J	01001	S	10010
B	00001	K	01010	T	10011
C	00010	L	01011	U	10100
D	00011	M	01100	V	10101
E	00100	N	01101	W	10110
F	00101	O	01110	X	10111
G	00110	P	01111	Y	11000
H	00111	Q	10000	Z	11001
I	01000	R	10001

S-BOX

	-0	-1	-2	-3	-4	-5	-6	-7	-8	-9	-A	-B	-C	-D	-E	-F
0-	63	7C	77	7B	F2	6B	6F	C5	30	01	67	2B	FE	D7	AB	76
1-	CA	82	C9	7D	FA	59	47	F0	AD	D4	A2	AF	9C	A4	72	C0
2-	B7	FD	93	26	36	3F	F7	CC	34	A5	E5	F1	71	D8	31	15
3-	04	C7	23	C3	18	96	05	9A	07	12	80	E2	EB	27	B2	75
4-	09	83	2C	1A	1B	6E	5A	A0	52	3B	D6	B3	29	E3	2F	84
5-	53	D1	00	ED	20	FC	B1	5B	6A	CB	BE	39	4A	4C	58	CF
6-	D0	EF	AA	FB	43	4D	33	85	45	F9	02	7F	50	3C	9F	A8
7-	51	A3	40	8F	92	9D	38	F5	BC	B6	DA	21	10	FF	F3	D2
8-	CD	0C	13	EC	5F	97	44	17	C4	A7	7E	3D	64	5D	19	73
9-	60	81	4F	DC	22	2A	90	88	46	EE	B8	14	DE	5E	0B	DB
A-	E0	32	3A	0A	49	06	24	5C	C2	D3	AC	62	91	95	E4	79
B-	E7	C8	37	6D	8D	D5	4E	A9	6C	56	F4	EA	65	7A	AE	08
C-	BA	78	25	2E	1C	A6	B4	C6	E8	DD	74	1F	4B	BD	8B	8A
D-	70	3E	B5	66	48	03	F6	0E	61	35	57	B9	86	C1	1D	9E
E-	E1	F8	98	11	69	D9	8E	94	9B	1E	87	E9	CE	55	28	DF
F-	8C	A1	89	0D	BF	E6	42	68	41	99	2D	0F	B0	54	BB	16

Example

Encrypted Word: BXEU
Screen 1: 7DDE6
Screen 2: ECC6C
Screen 3: 0010

B → 00001

7E → 01111110 + 0 → 0
DC → 11011100 + 0 → 1
DC → 11011100 + 0 → 1
E6 → 11100110 + 0 → 1
6C → 01101100 + 1 → 1

01111 + 0 → P

DC → 86
DC XOR 86 → 5A
E6 XOR 5A → BC
6C XOR BC → D0
7E XOR D0 → AE

X → 10111

86 → 10000110 + 1 → 0
5A → 01011010 + 0 → 0
BC → 10111100 + 1 → 0
D0 → 11010000 + 1 → 0
AE → 10101110 + 1 → 0

00000 + 0 → A

5A → BE
BC XOR BE → 02
D0 XOR 02 → D2
AE XOR D2 → 7C
86 XOR 7C → FA

E → 00100

BE → 10111110 + 0 → 0
02 → 00000010 + 0 → 1
D2 → 11010010 + 1 → 1
7C → 01111100 + 0 → 1
FA → 11111010 + 0 → 0

01110 + 1 → R

02 → 77
D2 XOR 77 → A5
7C XOR A5 → D9
FA XOR D9 → 23
BE XOR 23 → 9D

U → 10100

77 → 01110111 + 1 → 1
A5 → 10100101 + 0 → 0
D9 → 11011001 + 1 → 0
23 → 00100011 + 0 → 1
9D → 10011101 + 0 → 1

10011 + 0 → T

Decrypted Word: PART

	-0	-1	-2	-3	-4	-5	-6	-7	-8	-9	-A	-B	-C	-D	-E	-F
0-	63	7C	77	7B	F2	6B	6F	C5	30	01	67	2B	FE	D7	AB	76
1-	CA	82	C9	7D	FA	59	47	F0	AD	D4	A2	AF	9C	A4	72	C0
2-	B7	FD	93	26	36	3F	F7	CC	34	A5	E5	F1	71	D8	31	15
3-	04	C7	23	C3	18	96	05	9A	07	12	80	E2	EB	27	B2	75
4-	09	83	2C	1A	1B	6E	5A	A0	52	3B	D6	B3	29	E3	2F	84
5-	53	D1	00	ED	20	FC	B1	5B	6A	CB	BE	39	4A	4C	58	CF
6-	D0	EF	AA	FB	43	4D	33	85	45	F9	02	7F	50	3C	9F	A8
7-	51	A3	40	8F	92	9D	38	F5	BC	B6	DA	21	10	FF	F3	D2
8-	CD	0C	13	EC	5F	97	44	17	C4	A7	7E	3D	64	5D	19	73
9-	60	81	4F	DC	22	2A	90	88	46	EE	B8	14	DE	5E	0B	DB
A-	E0	32	3A	0A	49	06	24	5C	C2	D3	AC	62	91	95	E4	79
B-	E7	C8	37	6D	8D	D5	4E	A9	6C	56	F4	EA	65	7A	AE	08
C-	BA	78	25	2E	1C	A6	B4	C6	E8	DD	74	1F	4B	BD	8B	8A
D-	70	3E	B5	66	48	03	F6	0E	61	35	57	B9	86	C1	1D	9E
E-	E1	F8	98	11	69	D9	8E	94	9B	1E	87	E9	CE	55	28	DF
F-	8C	A1	89	0D	BF	E6	42	68	41	99	2D	0F	B0	54	BB	16

	-0	-1	-2	-3	-4	-5	-6	-7	-8	-9	-A	-B	-C	-D	-E	-F
0-	63	7C	77	7B	F2	6B	6F	C5	30	01	67	2B	FE	D7	AB	76
1-	CA	82	C9	7D	FA	59	47	F0	AD	D4	A2	AF	9C	A4	72	C0
2-	B7	FD	93	26	36	3F	F7	CC	34	A5	E5	F1	71	D8	31	15
3-	04	C7	23	C3	18	96	05	9A	07	12	80	E2	EB	27	B2	75
4-	09	83	2C	1A	1B	6E	5A	A0	52	3B	D6	B3	29	E3	2F	84
5-	53	D1	00	ED	20	FC	B1	5B	6A	CB	BE	39	4A	4C	58	CF
6-	D0	EF	AA	FB	43	4D	33	85	45	F9	02	7F	50	3C	9F	A8
7-	51	A3	40	8F	92	9D	38	F5	BC	B6	DA	21	10	FF	F3	D2
8-	CD	0C	13	EC	5F	97	44	17	C4	A7	7E	3D	64	5D	19	73
9-	60	81	4F	DC	22	2A	90	88	46	EE	B8	14	DE	5E	0B	DB
A-	E0	32	3A	0A	49	06	24	5C	C2	D3	AC	62	91	95	E4	79
B-	E7	C8	37	6D	8D	D5	4E	A9	6C	56	F4	EA	65	7A	AE	08
C-	BA	78	25	2E	1C	A6	B4	C6	E8	DD	74	1F	4B	BD	8B	8A
D-	70	3E	B5	66	48	03	F6	0E	61	35	57	B9	86	C1	1D	9E
E-	E1	F8	98	11	69	D9	8E	94	9B	1E	87	E9	CE	55	28	DF
F-	8C	A1	89	0D	BF	E6	42	68	41	99	2D	0F	B0	54	BB	16

	-0	-1	-2	-3	-4	-5	-6	-7	-8	-9	-A	-B	-C	-D	-E	-F
0-	63	7C	77	7B	F2	6B	6F	C5	30	01	67	2B	FE	D7	AB	76
1-	CA	82	C9	7D	FA	59	47	F0	AD	D4	A2	AF	9C	A4	72	C0
2-	B7	FD	93	26	36	3F	F7	CC	34	A5	E5	F1	71	D8	31	15
3-	04	C7	23	C3	18	96	05	9A	07	12	80	E2	EB	27	B2	75
4-	09	83	2C	1A	1B	6E	5A	A0	52	3B	D6	B3	29	E3	2F	84
5-	53	D1	00	ED	20	FC	B1	5B	6A	CB	BE	39	4A	4C	58	CF
6-	D0	EF	AA	FB	43	4D	33	85	45	F9	02	7F	50	3C	9F	A8
7-	51	A3	40	8F	92	9D	38	F5	BC	B6	DA	21	10	FF	F3	D2
8-	CD	0C	13	EC	5F	97	44	17	C4	A7	7E	3D	64	5D	19	73
9-	60	81	4F	DC	22	2A	90	88	46	EE	B8	14	DE	5E	0B	DB
A-	E0	32	3A	0A	49	06	24	5C	C2	D3	AC	62	91	95	E4	79
B-	E7	C8	37	6D	8D	D5	4E	A9	6C	56	F4	EA	65	7A	AE	08
C-	BA	78	25	2E	1C	A6	B4	C6	E8	DD	74	1F	4B	BD	8B	8A
D-	70	3E	B5	66	48	03	F6	0E	61	35	57	B9	86	C1	1D	9E
E-	E1	F8	98	11	69	D9	8E	94	9B	1E	87	E9	CE	55	28	DF
F-	8C	A1	89	0D	BF	E6	42	68	41	99	2D	0F	B0	54	BB	16