Question

Atbash cipher is an example of?

(a) Mono alphabetic substitution cipher

(b) Transposition cipher

(c) Poly alphabetic substitution cipher

(d) Geometric substitution cipher

This question was posed to me in an interview.

This question is from Cryptography topic in chapter Cryptography of Data Structures & Algorithms II

Answer 1

Right option is (a) Mono alphabetic substitution cipher

Easiest explanation - Atbash cipher is an example of mono alphabetic substitution cipher. It replaces each alphabet of the plain text with a corresponding letter which we can see in the table below.