The vigenere cipher is an encryption and decryption method that utilizes a key. It consists of the alphabet repeating for 26 rows/columns, but the first letter is pushed to the end of the alphabet, and this continues until z is the first letter in the 25th row. Click here to see the square. The program then uses the key for the rows and the message to be encrypted for the columns; the letters are matched up, and the encrypted message is displayed. Punctuation and spaces are untouched.
