A message is found with scrambled letters and no obvious cipher. A detective realizes the message reveals a location. What technique was used?
Category: Mystery · Difficulty: hard
Hint: Consider classical cryptographic methods using external references.
Answer
A book cipher used with page numbers
Explanation
A book cipher uses words or letters from a known text based on page and line numbers to encode messages.
This is a hard mystery riddle — a tricky one that takes a little thought. The answer is A book cipher used with page numbers.
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