Autokey Cipher: A Comprehensive Guide

Understanding the Features, Applications, and Cryptography of Autokey Cipher | Karthikeyan Nagaraj

Introduction:

In the world of cryptography, the Autokey Cipher is a classic technique used to secure messages.

It is a type of substitution cipher where each letter of the plaintext message is replaced by a letter determined by a key letter and the previous cipher letter.

In this article, we will explore the features, applications, and cryptography of the Autokey Cipher.

Features of Autokey Cipher:

• The Autokey Cipher is a polyalphabetic substitution cipher that uses a key to encrypt the plaintext message.
• The key is made up of a combination of letters and numbers, which are used to encrypt each letter of the plaintext message.
• The Autokey Cipher is a self-synchronizing cipher, meaning that it does not require the use of a separate synchronization mechanism to encrypt and decrypt the message.
• The length of the key is equal to or greater than the length of the plaintext message.

Use Cases of Autokey Cipher: