Question

Beaufort 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 an interview for job.

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

Answer 1

Right answer is (b) poly-alphabetic cipher

To explain: Beaufort cipher is a substitution cipher. It falls under the category of poly alphabetic cipher as it uses multiple substitutions at different positions in order to cipher the plain text.