Cryptography Basic (Caesar Cipher and Vigenere Cipher)

This video contains basis of cryptography system used in internet. Here I show how Caesar cipher and Vigenère cipher works. Both of them are one of the substitution cipher method where we replace or substitute individual plain-text by the cipher-text. Plain-text and cipher-text are terms used in cryptography where plain-text is the text to be encrypted and cipher-text is the encrypted text. This encrypted text is sent over the internet. Although substitution is not secure many modern crypto-system in conjunction with other cipher methods for making it more secure.
I also talk about Vigenère tableau and Feistel cipher.