Code breaking is the art of accessing information that someone else does not wan
ID: 3701046 • Letter: C
Question
Code breaking is the art of accessing information that someone else does not want you to have. This definition sounds simple, doesn't it?
Here is one that is a little bit more involved. Code breaking is also referred to as cryptanalysis, which is the body of knowledge relating to studying cryptosystems, as well as taking encrypted data and decrypting it without a key.
Primary Task Response:
Discuss three basic principles that we can use to break codes or systems.
Select one of the puzzles from pages 165 – 168 of our text.
Work the puzzle you selected to break the code.
please choose puzzl 8 or 9 converting ciphertext to plaintext
Chapter 6 Cryptanalysis and Code Breaking 1 hertext Z U Puzzle 7: Hint: Gandalf Let's move on to something a little more advanced and see if you can break the code of some secret messages that use a different type of substitution cipher. I want you to look at the following message and see if you can figure out its contents. Note that this new puzzle looks different, but it uses the same concept you just used. It is because of this similarity that I am not going to show you how to solve this type of puzzle, but I know you can do it. Plaintext Ciphertext 3 Cht14 25 15 21 11 5 5 16 195 3 18 5 120 Puzzle 8: Numeric substitution cipher oid you figure it out? Well, if you have a good eye and reasoned it out, you saw that au was substitute the actual letter with that letter's position in the alphabet (chat is Try this cipher all I did su A 1 and Z-26). same method. yourself by converting the following plaintext to ciphertext using the 4 251 12 23 1 25 19 20 8 5 185 918 5 9. Converting ciphertext to plaintext 8 15 14 15 18 4 21 20 25 19 5 18 22 9 3 5 e the code-breaking game a litle harder by revisiting ntroduce code words to the mix to make things more Ha t: Converting ciphertext to plaintext fun with those th those? Let's make code-breakii and hesar cipher, but with twist a t works, but now let me t ou a new twist added for kicks. At this point, you know the cExplanation / Answer
A 1
B 2
C 3
D 4
E 5
F 6
G 7
H 8
I 9
J 10
K 11
L 12
M 13
N 14
O 15
P 16
Q 17
R 18
S 19
T 20
U 21
V 22
W 23
X 24
Y 25
Z 26
Use this to map ciphertext to plaintext.
So the solutions to Puzzle 8 (i.e. ciphertext : 3 1 14 . 25 15 21 . 11 5 5 16 . 1 . 19 5 3 18 5 20) would be:
[Here '.' stand for space between words]
Plain text: "Can you keep a secret"
and that for Puzzle 9 (i.e. ciphertext : 1 12 23 1 25 19 . 18 5 1 4 25 . 1 12 23 1 25 19 . 20 8 5 18 5 ) would be:
"Always ready always there"