Question

Which of the following is a difference between beaufort cipher and vigenere cipher?

(a) they use different tables for encryption

(b) vigenere cipher is poly alphabetic whereas beaufort cipher is mono alphabetic

(c) vigenere cipher uses a key whereas no key is required for using beaufort cipher

(d) they use the same table for encryption, but in a different manner

The question was asked in a national level competition.

My doubt is from Cryptography in chapter Cryptography of Data Structures & Algorithms II

Answer 1

The correct option is (d) they use the same table for encryption, but in a different manner

The best I can explain: Beaufort cipher is a variation of vigenere cipher. They use the same table i.e. tabula recta for encryption but the table is used in a different manner.