Question

Choose the weakest cipher from the following?

(a) vigenere cipher

(b) rail fence cipher

(c) hill cipher

(d) atbash cipher

The question was posed to me during an internship interview.

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

Answer 1

Correct option is (d) atbash cipher

For explanation: Atbash cipher is the weakest cipher out of the given options. This is because it is a simple mono alphabetic substitution cipher with almost no security. It can be cracked without even knowing which technique has been used for encryption.