Question

Running key cipher is harder to decipher than keyword cipher.

(a) true

(b) false

The question was posed to me during an online exam.

My doubt is from Cryptography topic in section Cryptography of Data Structures & Algorithms II

Answer 1

The correct option is (a) true

Explanation: Keyword cipher is less secure than running key cipher. It is due to the fact that keyword cipher is mono alphabetic and thus can be cracked using frequency analysis. But running key cipher being a poly alphabetic cipher is harder to crack.