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Gronsfeld Cipher
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Gronsfeld is a variant of Vigenère; not secure.
Encode
Decode
Key (digits):
Run
Gronsfeld — FAQs
FAQs
Related tools
Vigenere
Autokey
Gronsfeld cipher FAQs
FAQs
Digits-only key?
Gronsfeld uses numeric keys (0–9 shifts) similar to Vigenère.