R would be written as B when we consider the top row as out string and column as the key and so on for the rest of the string.Īnd so RAKSHIT would be encrypted as BEICLGD. Vigenere Cipher is somewhat polyalphabetic substitution strategy. Now Each alphabet was mapped so as to get the encrypted alphabet. In this instructional exercise, you will find out about vigenere cipher in C and C++ for encryption and decryption.

So the key decided was written below the string this way : Just suppose 'RAKSHIT' was to be encrypted and the key decided was 'KEY'

SARAN Hill Cipher yang dijelaskan dalam paper ini merupakan contoh. So Looking at this table I ll give you an Example. Hill Cipher Program in C Write a program that encrypts alphabetic letters in a file. Talking about the table which was used for encryption and decryption was basically a kind of mapping table. It also applied that a same alphabet in the same string can have a different code alphabet which made the decryption more and more complex. In simple words it was a type of poly-alphabetical encryption where a key decided by the person who encrypted the text, was used for decryption. Vigenere Cipher is a way of encryption where different series of Caesar Cipher were used.

Earlier we talked about Caesar Cipher and its implementation both in C and C++, it was a kind of encryption where each letter was replaced by a letter corresponding to a certain number of alphabets after or before it.

Contoh program vigenere cipher