Question

Vigenere cipher is an example of ______________

(a) mono-alphabetic cipher

(b) poly-alphabetic cipher

(c) transposition cipher

(d) additive cipher

I have been asked this question in final exam.

I need to ask this question from Cryptography topic in chapter Cryptography of Data Structures & Algorithms II

Answer 1

The correct choice is (b) poly-alphabetic cipher

Easiest 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.