Question

Encryption in Rail fence cipher is done using _____________

(a) by arranging the letters in a zig zag fashion in a table

(b) by randomly arranging letters

(c) by arranging letters in vigenere table

(d) by swapping adjacent letters

This question was addressed to me in an international level competition.

Enquiry is from Cryptography topic in chapter Cryptography of Data Structures & Algorithms II

Answer 1

Correct answer is (a) by arranging the letters in a zig zag fashion in a table

The explanation is: Rail fence cipher is a transposition cipher. It encrypts a given plain text by arranging the letters in a zig zag fashion in a table.