Cryptography Tutorial with Examples and Exercises - Desklib

Running head: CRYPTOGRAPHY
CRYPTOGRAPHY
Name of the Student
Name of the University
Author Note

1CRYPTOGRAPHY
Cryptography Tutorial 1 2019
1)
a)
Plain
text
D E R B Y
3 4 17 1 24
( + ) 19 19 19 19 19
22 23 36 20 43 (mod
26)
22 23 16 20 17
Cipher
text
M N A K H
b)
Cipher
text
F X W B M X K K T G X T G
5 23 22 1 12 23 10 10 19 6 23 19 6
( - ) 19 19 19 19 19 19 19 19 19 19 19 19 19
-14 4 3 -18 -7 4 -9 -9 0 -13 4 0 -13 (mod
26)
12 4 3 8 19 4 17 17 0 13 4 0 13
Plain
text
M E D I T E R R A N E A N

2CRYPTOGRAPHY
2)
a)
Cipher text M Y N S X Q
12 24 13 18 23 16
( - ) 10 10 10 10 10 10
2 14 3 8 13 6 (mod 26)
2 14 3 8 13 6
Plain text C O D I N G
b)
Cipher text M S G
12 18 6
( - ) 12 12 12
24 30 18 (mod 26)
24 4 18
Plain text Y E S
3)

3CRYPTOGRAPHY
Plain
text
K E D L E S T O N R O A D
Key FINAL YEAR STUDENT
Cipher
text
U L A D L M O G C K G F A
4) REVERSE ALPHABET
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Z Y X W V U T S R Q P O N M L K J I H G F E D C B A
Plain
text
T H E S S A L O N I K I
Cipher
text
G S V H H Z O L M R P R
Cryptography Tutorial 2
1)
Message ten green bottles hanging on the wall
Key KEDLESTON ROAD