This one is from the archive. Play it for practice — past puzzles never
count toward a streak. Today’s cipher is here.
3 guesses to crack the cipher.
One cipher each day.
Review Day
The cipher’s name is withheld — working out which it is comes first
NBWWOLSMGHIRZOW
Need a nudge?
One of this week's ciphers — working out which is part of the puzzle.
The answer
NOBODY ELSE KNOWS
How it works
A review day — the cipher's name was withheld, so step one was working out which of the week's techniques was in play. This is a shift cipher whose shift keeps changing. That is why letter frequency looks flat and nothing obvious jumps out. This one is Autokey. The key: primer ANVIL. The key starts as ANVIL, then the message itself takes over as the key. Decode the first letters and the rest unravels. Line the key ANVIL up under the message and undo each letter's own shift. The opening letters come back as N O B. The answer was NOBODY ELSE KNOWS.
