Mastering Polyalphabetic & Autokey Ciphers in Cryptography 🔐

Cryptography & Network Security: Polyalphabetic Cipher, Its type Autokey Cipher and Solved Example.
Below is the link for additive ciphers, we have used additive ciphers in Autokey cipher.
Additive Cipher: https://www.youtube.com/watch?v=xzae2DUgQFs&list=PLKIRSj1jPFW0pRMrmxOW5-VsWaJvUQdMF&index=18&t=56s