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: -


Cipher Key:

Vigenere Equivalent:

Your message:

This is your encoded or decoded text:

The "sirloin" of a cow was actually named by an English monarch. The king was so impressed by this particular cut of meat that he decided to bestow peerage upon it. Tyler Akins <>
Legal Info