Gronsfeld Cipher

The Gronsfeld cipher is essentially a Vigenere cipher, but uses numbers instead of letters. So, a Gronsfield key of 0123 is the same as a Vigenere key of ABCD. This online version lets you encode and decode messages with a keyed alphabet as well, to allow for maximum flexibility.

Alphabet Key: -

Alphabet Used: ABCDEFGHIJKLMNOPQRSTUVWXYZ - Show Tableau

Cipher Key:

Vigenere Equivalent:

Your message:

This is your encoded or decoded text:

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