
Encryption and Code-Breaking Concepts
Interactive Video
•
Computers, Mathematics, History
•
9th - 12th Grade
•
Hard

Aiden Montgomery
FREE Resource
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10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is a key characteristic of symmetric key methods?
They require no prior agreement between sender and receiver.
The same key is used for both encryption and decryption.
They use different keys for encryption and decryption.
They are immune to frequency analysis.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How did the Enigma machine reduce the risk of frequency analysis?
By rotating wheels that changed the substitution after each character.
By using a single substitution cipher.
By encrypting only vowels.
By using a fixed mapping for all characters.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the example of encrypting the word 'CORD', what is the first encrypted letter?
F
C
D
E
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What happens to the mapping after each character is encrypted in a shifting Caesar Cipher?
It shifts two positions.
It remains the same.
It shifts one position.
It reverses completely.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
When decrypting the word 'LEAST', what is the first decrypted letter?
S
L
E
A
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What was a significant challenge in breaking the Enigma machine's code?
The complexity of the substitution cipher.
The use of multiple wheels in a chain.
The lack of captured Enigma devices.
The simplicity of the encryption method.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What was the key length used in the DES encryption standard?
256 bits
56 bits
128 bits
64 bits
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