Cipherday #51 · August 13, 2026
The answer to Cipherday #51
The full three-cipher chain from August 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
“In three words I can sum up everything I have learned about life: it goes on.”— attributed to Robert Frost
A brief, level acceptance of time’s forward march.
The cipher chain
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Stage 1 · Caesar · Shift of 20
Ciphertext
Nby yulfs vclx wunwbym nby qilg.Decodes to
The early bird catches the worm.Every letter was slid 20 places down the alphabet; sliding it back the same amount restores the line.
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Stage 2 · Substitution · Keyword “CIPHERS”
Ciphertext
Klt cgg talqe wal wckheo coe glqt.Decodes to
Not all those who wander are lost.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 “THUNDER”
Ciphertext
Bu nuuiv pvlqv M ttu mhp yg xcyebxybua V kemx synurvw hvbxx cbmy: vw kfxz ia.Decodes to
In three words I can sum up everything I have learned about life: it goes on.A repeating keyword shifted each letter by a different amount, which is what lets one letter encrypt two ways; the right keyword resolves it.