Question

Playfair cipher is an example of __________

(a) mono-alphabetic cipher

(b) poly-alphabetic cipher

(c) transposition cipher

(d) additive cipher

I had been asked this question in quiz.

I'm obligated to ask this question of Cryptography in portion Cryptography of Data Structures & Algorithms II

Answer 1

Right choice is (b) poly-alphabetic cipher

For explanation: Playfair cipher is a substitution cipher. It falls under the category of poly alphabetic cipher as it uses multiple substitution at different positions in order to cipher the plain text.