Question

Choose the weakest cipher from the following?

(a) Vigenere cipher

(b) Autokey cipher

(c) Affine cipher

(d) Hill cipher

The question was asked during an interview for a job.

This key question is from Cryptography in portion Cryptography of Data Structures & Algorithms II

Answer 1

Correct answer is (c) Affine cipher

The explanation is: Affine cipher is the weakest cipher out of the given options as it is a mono alphabetic cipher and other options are poly alphabetic ciphers. So it is quite vulnerable to frequency analysis.