Cipherday #82 · September 13, 2026
The answer to Cipherday #82
The full three-cipher chain from September 13, 2026, the public-domain quote it hid, and how each cipher worked. Today’s chain stays sealed until it becomes a past day.
The revealed quote
“The greatest wealth is to live content with little.”— attributed to Plato
Riches redefined as ease with a small and honest portion.
The cipher chain
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Stage 1 · Caesar · Shift of 8
Ciphertext
Twab bqum qa vmdmz nwcvl ioiqv.Decodes to
Lost time is never found again.Every letter was slid 8 places down the alphabet; sliding it back the same amount restores the line.
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Stage 2 · Substitution · Keyword “SIGNAL”
Ciphertext
Wahh iabuk dr cshl nmka.Decodes to
Well begun is half done.A keyword scrambled the alphabet into a fixed cipher alphabet, so each letter always stands for the same partner — letter frequency gives it away.
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Stage 3 · Vigenère · Keyword “SPHINX”
Ciphertext
Lwl oebsilag twpsbu fk iv tvsw rvvgbfi dqge dxabyb.Decodes to
The greatest wealth is to live content with little.A repeating keyword shifted each letter by a different amount, which is what lets one letter encrypt two ways; the right keyword resolves it.