WorksheetsVigenere Cipher
Total questions: 10
Worksheet time: 5mins
Name
Class
Date
1.
What type of cipher is the Vigenere cipher classified as?
a)
A symmetric key cipher
b)
A transposition cipher
c)
A polyalphabetic substitution cipher
d)
A block cipher
2.
How does the Vigenere cipher utilize a matrix in its encryption process?
a)
It encrypts the plaintext in blocks.
b)
It organizes the key letters in a linear format.
c)
It represents possible mappings from one letter to another.
d)
It uses a matrix to store plaintext letters only.
3.
What is the first step in encrypting a plaintext letter using the Vigenere cipher?
a)
Process the plaintext letter across the columns.
b)
Map the plaintext letter to the key letter.
c)
Determine the key letter.
d)
Generate the ciphertext.
4.
Which of the following best describes the process of encrypting plaintext in the Vigenere cipher?
a)
Encrypting letters based on their frequency.
b)
Encrypting all letters simultaneously.
c)
Encrypting letters in reverse order.
d)
Encrypting letters one at a time across the columns.
5.
In the Vigenere cipher, how does the length of the key relate to the plaintext?
a)
The key should be shorter than the plaintext.
b)
The key should be longer than the plaintext.
c)
The key should be the same length as the plaintext.
d)
The key can be any length.
6.
Which of the following statements about the Vigenere cipher is true?
a)
It uses a single key letter for all plaintext letters.
b)
It processes letters one at a time.
c)
It does not require a key for encryption.
d)
It encrypts letters in groups of three.
7.
If the plaintext letter 'A' is encrypted using the key letter 'L', what is the resulting ciphertext letter?
a)
M
b)
Z
c)
L
d)
A
8.
How does the key letter 'E' affect the encryption of the plaintext letter 'T' in the Vigenere cipher?
a)
It does not affect the encryption.
b)
It changes 'T' to 'A'.
c)
It changes 'T' to 'X'.
d)
It changes 'T' to 'L'.
9.
What happens when the plaintext letter 'T' is mapped using the key letter 'M' in the Vigenere cipher?
a)
It becomes 'Z'.
b)
It becomes 'F'.
c)
It becomes 'A'.
d)
It remains 'T'.
10.
What is the ciphertext for the plaintext 'A-T-T' using the key 'L-E-M'?
a)
A-B-C
b)
T-U-V
c)
L-X-F
d)
M-N-O
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