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We've all seen tables of characters useful in encoding or decoding a vigenere cypher. Could such a chart be implemented in a decoder ring?

I envision three rings in one. As the user turns the top ring to align a text-character with a key-character on the second ring, the third ring turns to align the cypher-character, and working the other way, turning the third ring to align the cypher-character with the key-character aligns the first ring to the text-character.

Does that exist? If it doesn't, could it? Cuz I want one.

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  • $\begingroup$ These sorts of things? yeggi.com/q/cipher+decoder+ring $\endgroup$
    – Daniel S
    Commented Mar 22 at 12:29
  • $\begingroup$ Yeah, kinda like that, except useful for a vigenere cypher. $\endgroup$
    – Truth
    Commented Apr 23 at 14:09
  • $\begingroup$ Any of the one's labelled Caesar cipher decoder would also be usable as a Vigenere decoder $\endgroup$
    – Daniel S
    Commented Apr 25 at 6:03

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