Vigenere Cipher Multiple choice Questions and Answers (MCQs)

 

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Vigenere Cipher Multiple choice Questions and Answers (MCQs)

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Question 1
What is the meaning of cipher in cryptography?
A
an algorithm that performs encryption
B
an algorithm that generates a secret code
C
an algorithm that performs encryption or decryption
D
a secret code
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Question 1 Explanation: 
Cipher is an algorithm for performing encryption or decryption. In cryptography, a set of defined steps are followed to generate ciphers. These are necessary to prevent data breach.

Question 2
Vigenere cipher is an example of .....
A
mono-alphabetic cipher
B
poly-alphabetic cipher
C
transposition cipher
D
additive cipher
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Question 2 Explanation: 
Vigenere cipher is a substitution cipher. It falls under the category of poly alphabetic cipher as it uses multiple substitution at different positions in order to cipher the plain text.

Question 3
Encryption in Vigenere cipher is done using .....
A
vigenere formula
B
vigenere cycle
C
vigenere square
D
vigenere addition
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Question 3 Explanation: 
Encryption of plain text using vigenre cipher is done by making use of vigenere table. It is also known as vigenere square.

Question 4
Which of the following correctly defines poly alphabetic cipher?
A
a substitution based cipher which uses multiple substitution at different positions
B
a substitution based cipher which uses fixed substitution over entire message
C
a transposition based cipher which uses multiple substitution at different positions
D
a transposition based cipher which uses fixed substitution over entire message
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Question 4 Explanation: 
Poly alphabetic cipher is a type of substitution cipher. It uses multiple substitution at different positions in order to cipher the plain text.

Question 5
Which of the following is not a type of poly alphabetic cipher?
A
Rotor cipher
B
Hill cipher
C
One time pad cipher
D
Multiplicative cipher
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Question 5 Explanation: 
In poly alphabetic cipher each symbol of plain text is replaced by a different cipher text regardless of its occurrence. Out of the given options only multiplicative cipher is not a poly alphabetic cipher.

There are 5 questions to complete.

 

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