Maths and Computing:

Vernam Cipher Question

Bits = 4

Decode NHCLP using the One-time only pad PHAML

Enter Answer #CCEEAA

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Alphabet	A	B	C	D	E	F	G	H
Binary Value	0000	0001	0010	0011	0100	0101	0110	0111
Alphabet	I	J	K	L	M	N	O	P
Binary Value	1000	1001	1010	1011	1100	1101	1110	1111

	Binary values assigned to each character
Ciphertext	N	H	C	L	P
Ciphertext Binary Values	1101	0111	0010	1011	1111
One-Time Pad	P	H	A	M	L
Pad Binary Values	1111	0111	0000	1100	1011

	Binary values assigned to each character
Ciphertext	N	H	C	L	P
Ciphertext Binary Values	1101	0111	0010	1011	1111
One-Time Pad	P	H	A	M	L
Pad Binary Values	1111	0111	0000	1100	1011
	Result of a bitwise XOR operation between the two binary values
value1	1101	0111	0010	1011	1111
value2	1111	0111	0000	1100	1011
value1 XOR value2	0010	0000	0010	0111	0100

The answer is: CACHE

	Binary values assigned to each character
Ciphertext	N	H	C	L	P
Ciphertext Binary Values	1101	0111	0010	1011	1111
One-Time Pad	P	H	A	M	L
Pad Binary Values	1111	0111	0000	1100	1011
	Result of a bitwise XOR operation between the two binary values
value1	1101	0111	0010	1011	1111
value2	1111	0111	0000	1100	1011
value1 XOR value2	0010	0000	0010	0111	0100
	Characters assigned to each resulting binary value
Plaintext Binary Values	0010	0000	0010	0111	0100
Plaintext	C	A	C	H	E

Vernam Cipher Question

Bits = 5

Decode ZP$IM]RR using the One-time only pad [B]]AY]C

Enter Answer #CCEEAA

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Alphabet	A	B	C	D	E	F	G	H
Binary Value	00000	00001	00010	00011	00100	00101	00110	00111
Alphabet	I	J	K	L	M	N	O	P
Binary Value	01000	01001	01010	01011	01100	01101	01110	01111
Alphabet	Q	R	S	T	U	V	W	X
Binary Value	10000	10001	10010	10011	10100	10101	10110	10111
Alphabet	Y	Z	[	#	]	^	$	%
Binary Value	11000	11001	11010	11011	11100	11101	11110	11111

	Binary values assigned to each character
Ciphertext	Z	P	$	I	M	]	R	R
Ciphertext Binary Values	11001	01111	11110	01000	01100	11100	10001	10001
One-Time Pad	[	B	]	]	A	Y	]	C
Pad Binary Values	11010	00001	11100	11100	00000	11000	11100	00010

	Binary values assigned to each character
Ciphertext	Z	P	$	I	M	]	R	R
Ciphertext Binary Values	11001	01111	11110	01000	01100	11100	10001	10001
One-Time Pad	[	B	]	]	A	Y	]	C
Pad Binary Values	11010	00001	11100	11100	00000	11000	11100	00010
	Result of a bitwise XOR operation between the two binary values
value1	11001	01111	11110	01000	01100	11100	10001	10001
value2	11010	00001	11100	11100	00000	11000	11100	00010
value1 XOR value2	00011	01110	00010	10100	01100	00100	01101	10011

The answer is: DOCUMENT

	Binary values assigned to each character
Ciphertext	Z	P	$	I	M	]	R	R
Ciphertext Binary Values	11001	01111	11110	01000	01100	11100	10001	10001
One-Time Pad	[	B	]	]	A	Y	]	C
Pad Binary Values	11010	00001	11100	11100	00000	11000	11100	00010
	Result of a bitwise XOR operation between the two binary values
value1	11001	01111	11110	01000	01100	11100	10001	10001
value2	11010	00001	11100	11100	00000	11000	11100	00010
value1 XOR value2	00011	01110	00010	10100	01100	00100	01101	10011
	Characters assigned to each resulting binary value
Plaintext Binary Values	00011	01110	00010	10100	01100	00100	01101	10011
Plaintext	D	O	C	U	M	E	N	T

Vernam Cipher Question

Bits = 6

Decode dXCSoCG using the One-time only pad BqgqEgx

Enter Answer #CCEEAA

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Alphabet	A	B	C	D	E	F	G	H
Binary Value	000000	000001	000010	000011	000100	000101	000110	000111
Alphabet	I	J	K	L	M	N	O	P
Binary Value	001000	001001	001010	001011	001100	001101	001110	001111
Alphabet	Q	R	S	T	U	V	W	X
Binary Value	010000	010001	010010	010011	010100	010101	010110	010111
Alphabet	Y	Z	[	#	]	^	$	%
Binary Value	011000	011001	011010	011011	011100	011101	011110	011111
Alphabet	a	b	c	d	e	f	g	h
Binary Value	100000	100001	100010	100011	100100	100101	100110	100111
Alphabet	i	j	k	l	m	n	o	p
Binary Value	101000	101001	101010	101011	101100	101101	101110	101111
Alphabet	q	r	s	t	u	v	w	x
Binary Value	110000	110001	110010	110011	110100	110101	110110	110111
Alphabet	y	z	{	|	}	~	&	?
Binary Value	111000	111001	111010	111011	111100	111101	111110	111111

	Binary values assigned to each character
Ciphertext	d	X	C	S	o	C	G
Ciphertext Binary Values	100011	010111	000010	010010	101110	000010	000110
One-Time Pad	B	q	g	q	E	g	x
Pad Binary Values	000001	110000	100110	110000	000100	100110	110111

	Binary values assigned to each character
Ciphertext	d	X	C	S	o	C	G
Ciphertext Binary Values	100011	010111	000010	010010	101110	000010	000110
One-Time Pad	B	q	g	q	E	g	x
Pad Binary Values	000001	110000	100110	110000	000100	100110	110111
	Result of a bitwise XOR operation between the two binary values
value1	100011	010111	000010	010010	101110	000010	000110
value2	000001	110000	100110	110000	000100	100110	110111
value1 XOR value2	100010	100111	100100	100010	101010	100100	110001

The answer is: checker

	Binary values assigned to each character
Ciphertext	d	X	C	S	o	C	G
Ciphertext Binary Values	100011	010111	000010	010010	101110	000010	000110
One-Time Pad	B	q	g	q	E	g	x
Pad Binary Values	000001	110000	100110	110000	000100	100110	110111
	Result of a bitwise XOR operation between the two binary values
value1	100011	010111	000010	010010	101110	000010	000110
value2	000001	110000	100110	110000	000100	100110	110111
value1 XOR value2	100010	100111	100100	100010	101010	100100	110001
	Characters assigned to each resulting binary value
Plaintext Binary Values	100010	100111	100100	100010	101010	100100	110001
Plaintext	c	h	e	c	k	e	r