Question

Vigenere cipher is harder to decipher than keyword cipher.

(a) true

(b) false

I had been asked this question in an online interview.

This is a very interesting question from Cryptography in division Cryptography of Data Structures & Algorithms II

Answer 1

Right option is (a) true

The best I can explain: Keyword cipher is less secure than vigenere cipher. It is due to the fact that keyword cipher is mono alphabetic and thus can be cracked using frequency analysis. But vigenere cipher being a poly alphabetic cipher cannot be deciphered using this method.