Question

Which of the following was the first poly graphic cipher to be able to operate on more than 3 letters at once?

(a) autokey cipher

(b) hill cipher

(c) one time pad cipher

(d) playfair cipher

I got this question in quiz.

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

Answer 1

Right choice is (b) hill cipher

Explanation: Poly graphic cipher is a type of substitution cipher in which substitution is performed over a block of letters. Hill cipher was the first poly graphic cipher to be able to operate on more than 3 letters at once.