Cryptography & N/W Security: #18 Playfair, Vignere, Hill, One time pad Polyalphabetic Ciphers

Cryptography & Network Security: Playfair, Vignere, Hill, One time pad Polyalphabetic Ciphers with example each. You also need to know additive and multiplicative ciphers because they are used in above polyalphabetic ciphers Additive cipher: https://youtu.be/xzae2DUgQFs Multiplicative Cipher: https://youtu.be/8bUkr6ptSbQ