Question

Columnar cipher falls under the category of?

(a) mono-alphabetic cipher

(b) poly-alphabetic cipher

(c) transposition cipher

(d) additive cipher

I got this question during an online interview.

Question is from Cryptography in section Cryptography of Data Structures & Algorithms II

Answer 1

Right answer is (c) transposition cipher

The best I can explain: Columnar cipher is a transposition cipher. It falls under the category of transposition cipher as it encrypts the plain text by rearranging its letters.