Vigenére Autokey

This is an extension to the Vigenere cipher that makes it much harder to break. Instead of repeating the passphrase over and over in order to encrypt the text, the passphrase is used once and the cleartext is used to decrypt or encrypt the text.

Alphabet Key: -

Alphabet Used: ABCDEFGHIJKLMNOPQRSTUVWXYZ - Show Tableau

Passphrase:

Your message:

This is your encoded or decoded text:

In the ninth century, the Pope decreed that all church weather vanes should have a rooster to symbolize the apostle Peter's denial of Christ. This is the reason that weather vanes typically have a rooster on them today. Tyler Akins <>
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