Question

Playfair cipher is harder to crack than keyword cipher.

(a) True

(b) False

This question was addressed to me during an online exam.

The origin of the question is Cryptography in section Cryptography of Data Structures & Algorithms II

Answer 1

Correct option is (a) True

For explanation: Keyword cipher is less secure than playfair cipher. It is due to the fact that keyword cipher is mono alphabetic and thus can be cracked using frequency analysis. But playfair cipher being a poly graphic substitution cipher is harder to break using this method.