LING 3801 Crypto Tools
Spring 2023

Go back to Vigenere Cipher

The Vigenere cipher works by taking a plain text and enciphering each letter by a particular shift cipher indicated by a key. The cryptanalysis involves checking for repeated sequences of letters. A more advanced cryptanalysis involves calculating Indexes of coincidence And using those values to determine the key length. This method can also be applied to calculate the values of the key with some success.