The Vigenere Cipher is a simple form of polyalphabetic substitution; the method encrypts a message based off a key passed by the message's creator. The message can then be decrypted easily if you know the key.
This method is a great encryption implementation because using its frequency analysis will not help to decipher the secret message. Also, the same letters can (and will) be encrypted into different letters. For example, if your message contains the word green, the encrypted message's e's will both most likely be a different letter.
gmae hg n xwoqsg rwerotj tdnitml fn mbz tk: rhrawz hg gmw ndgg!
I bet you have no idea what the above collection of nonsense means. paste
the above sentence into the message box. Make sure you select "Decrypt."
the key is: MERLYN