Question

Which of the following is a modified version of Caesar cipher?

(a) vigenere cipher

(b) autokey cipher

(c) running key cipher

(d) trithemius cipher

I got this question by my college director while I was bunking the class.

I need to ask this question from Cryptography topic in division Cryptography of Data Structures & Algorithms II

Answer 1

Correct answer is (d) trithemius cipher

The best explanation: If in caesar cipher we consider a shift that increases by 1 by each letter starting at 0 then it is equivalent to trithemius cipher. So trithemius cipher is a special case of caesar cipher.