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:

U.S. Coins with ridges were originally made with precious metals. The ridges were used to easily detect people clipping or filing off some of the metal. Tyler Akins <>
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