Polyalphabetic Cipher Multiple choice Questions and Answers (MCQs)
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What is the meaning of cipher in cryptography?
an algorithm that performs encryption
an algorithm that generates a secret code
an algorithm that performs encryption or decryption
a secret code
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.
Which of the following ciphers are created by shuffling the letters of a word?
rail fence cipher
Question 2 Explanation:
There are two types of traditional ciphers- Transposition and substitution cipher. In transposition cipher the letters of the given data are shuffled in a particular order, fixed by a given rule. Rail fence cipher is an example of transposition cipher.
Which of the following is a type of substitution cipher?
poly alphabetic cipher
rail fence cipher
Question 3 Explanation:
In substitution cipher the plain text is replaced by cipher text according to a fixed rule. There are two types of substitution cipher- Mono alphabetic and Poly alphabetic cipher.
Which of the following correctly defines poly alphabetic cipher?
a substitution based cipher which uses multiple substitution at different positions
a substitution based cipher which uses fixed substitution over entire message
a transposition based cipher which uses multiple substitution at different positions
a transposition based cipher which uses fixed substitution over entire message
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.
Which of the following is not a type of poly alphabetic cipher?
One time pad cipher
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 affine cipher is not a poly alphabetic cipher.
There are 5 questions to complete.