Cipherday #77 · September 8, 2026
The answer to Cipherday #77
The full three-cipher chain from September 8, 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
“Reading maketh a full man; conference a ready man; and writing an exact man.”— Francis Bacon (Of Studies, 1625)
Bacon’s recipe for a mind shaped by book, talk, and pen.
The cipher chain
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Stage 1 · Caesar · Shift of 13
Ciphertext
Yrneavat arire rkunhfgf gur zvaq.Decodes to
Learning never exhausts the mind.Every letter was slid 13 places down the alphabet; sliding it back the same amount restores the line.
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Stage 2 · Substitution · Keyword “MERIDIAN”
Ciphertext
Tbd wblhd cs nqdmtdq tbmk tbd suj la cts omqts.Decodes to
The whole is greater than the sum of its parts.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 “DECODE”
Ciphertext
Uicrlrj qcyhxk e hiop pep; qrriitsqgh e tsdhb qcb; drg atwwmqk cb hbdgv adr.Decodes to
Reading maketh a full man; conference a ready man; and writing an exact man.A repeating keyword shifted each letter by a different amount, which is what lets one letter encrypt two ways; the right keyword resolves it.