Vigenere Cipher || Polyalphabetic Cipher (Vigenère Cipher) || #trending #viral

#trending #viral #viralvideo Network Security: Polyalphabetic Cipher (Vigenère Cipher) Topics discussed: 1) Classical encryption techniques and introduction to polyalphabetic substitution cipher. 2) Comparison of mono-alphabetic substitution cipher with a polyalphabetic substitution cipher. 3) Working of Vigenere cipher with an example. 4) Cryptanalysis on Vigenere Cipher: Repeating keys and frequency distribution of key and plaintext. 5) Need for auto-key system and effect of auto-key system on Vigenere cipher to improve the security of Vigenere cipher with an example.