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Unit 3: Classic Cryptography Flashcards | StudBud
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Unit 3: Classic Cryptography
Unit 3: Classic Cryptography
31 terms
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Cybersecurity
Flashcards
31 cards
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Questions
31
Answers
1
What is frequency analysis?
study of letters or groups of letters in a ciphertext
1s and 0s
art of writing or solving codes
2
ASCII is...
base-16
number system
1s and 0s of the computing world
a method representing letters as numbers
3
Scytale cipher is a...
Transposition Cipher
Substitution Cipher
Sound Cipher
Semantic Cipher
4
Binary is just...
electrical signals that register 2 states: on or off
method for representing text
network of computers
CPU of a computer
5
... is a step by step process
Cipher
Steganography
algorithm
Cryptography
6
Decimal value for 0011 is...
8
2
5
3
7
What is the downfall of the Caesar Cipher?
frequency analysis
polyalphabetic
transposition
brute force
8
What is the decimal value for 1111 1111?
200
256
8
255
9
Cryptography is derived from the Greek word, 'kryptos'. What does 'kryptos' mean?
to write
Circular
Study of
hidden
10
What type of cipher is a "cipher wheel" used for?
Enigima
Morse Code
Caesar Cipher
Mary Queen of Scots
11
What is a transposition cipher?
Characters are scrambled once the paper is removed
Letters are replaced with another letter
12
Hexadecimal is used to help humans read and talk about large binary numbers
True
False
13
How many shifts are possible with a Caesar Cipher?
12
25
22
27
14
What is cryptography?
transforming info into secure form so other's can't see it
study of crypts
a series of 1s and 0s
15
Decimal is...
base-8
base-10
base-2
base-16
16
If you decrypt ciphertext, what do you end up with?
Algorithm
Cipher
Plaintext
Caesar Cipher
17
... is changing the secret text back to it's original form.
Encryption
Security
RSA Security
Decryption
18
The most common letter of the English language is...
T
A
E
S
19
What does https: mean?
Secure
Symmetric
Steganography
sockets
20
Mary Queen of Scots died because of cryptography.
TRUE
FALSE
21
Hexadecimal is...
Base-10
Base-16
Base-2
Base-8
22
... is the process of changing the orginal text into a secret message.
Decryption
security
Encryption
Steganography
23
Ciphertext can be decoded as long as you know the...
country
Key
steganography
lock
24
Hexadecimal is...
base-16
base-8
base-10
base-2
25
Morse codes uses a series of beeps and clicks
False
True
26
Binary is what system..
Base- 8
Base- 2
Base- 16
Base- 10
27
The computer system uses this number system to represent data
Secondary
Tertiary
Binary
Functional
28
Brute force is trial and error method to crack codes.
False
True
29
Privacy is...
encryption that involves the same key
freedom from attention,observation,or inference, based on your decision
picture in picture
30
Which cipher can this grid be useful for?
Vigenere
Affine
Caesar
Atbash
31
0s and 1s are bits
True
False
