Text to Gronsfeld Cipher
Encrypt and decrypt text using the Gronsfeld cipher, a polyalphabetic substitution cipher that uses a numeric key (digits 0-9) similar to Vigenère but with numbers instead of letters.
How to Use Text to Gronsfeld Cipher
Select encrypt or decrypt mode, enter your text, and provide a numeric key (digits 0-9 only). Each digit shifts the corresponding letter by that many positions in the alphabet.
Step-by-Step Instructions
- Select encrypt or decrypt mode
- Enter the text to process
- Enter a numeric key (e.g., 31415)
- Click the button and copy the result
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