Question

Trithemius cipher is an example of ________________

(a) mono-alphabetic cipher

(b) poly-alphabetic cipher

(c) transposition cipher

(d) additive cipher

I have been asked this question in homework.

Enquiry is from Cryptography in division Cryptography of Data Structures & Algorithms II

Answer 1

The correct option is (b) poly-alphabetic cipher

Easiest explanation - Trithemius cipher is a substitution cipher. It falls under the category of poly alphabetic cipher as it uses multiple substitutions at different positions in order to cipher the plain text.