Cipherday #59 · August 21, 2026
The answer to Cipherday #59
The full three-cipher chain from August 21, 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
“Great oaks from little acorns grow.”— traditional proverb
The largest things often begin from something easy to overlook.
The cipher chain
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Stage 1 · Caesar · Shift of 15
Ciphertext
Paa iwpi vaxiitgh xh cdi vdas.Decodes to
All that glitters is not gold.Every letter was slid 15 places down the alphabet; sliding it back the same amount restores the line.
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Stage 2 · Substitution · Keyword “QUARTZ”
Ciphertext
Zjmopit qir gjst zqsjm oct umqst.Decodes to
Fortune and love favor the brave.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 “PHOENIX”
Ciphertext
Vyseg wxzz tvbu ixahpr izdybw tzll.Decodes to
Great oaks from little acorns grow.A repeating keyword shifted each letter by a different amount, which is what lets one letter encrypt two ways; the right keyword resolves it.