Question

Gronsfeld cipher is a variation of ____________

(a) autokey cipher

(b) vigenere cipher

(c) hill cipher

(d) route cipher

This question was posed to me by my school principal while I was bunking the class.

This question is from Cryptography topic in division Cryptography of Data Structures & Algorithms II

Answer 1

The correct option is (b) vigenere cipher

To explain: Gronsfeld cipher is a variation of vigenere cipher. The difference is that vigenere cipher uses an alphabetical key whereas the key of gronsfeld cipher consists of numbers.