Question

Trithemius cipher is a special case of _______________

(a) autokey cipher

(b) vigenere cipher

(c) hill cipher

(d) route cipher

This question was addressed to me in an internship interview.

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

Answer 1

Correct option is (b) vigenere cipher

The explanation is: Trithemius cipher is a special case of vigenere cipher. The difference is that vigenere cipher uses a different key every time but a fixed key is used by trithemius cipher.