Read a cryptogram
A substitution cryptogram keeps a consistent mapping between cipher letters and plain letters. Repeated patterns can be more informative than guessing an entire sentence at once.
By Zehano · Original AI-assisted explanation and worked example · Updated 16 October 2026 · Editorial approach
A worked example
Suppose a three-letter cipher word has the pattern ABA. Its first and last letters decode to the same letter. A guess with different first and last letters cannot fit that pattern. When you assign one mapping, inspect every occurrence of that cipher letter, not only the word where you first noticed it.
Try it in three steps
- Notice word lengths and repeated positions.
- Try a mapping consistently across the sentence.
- Reject a guess when it breaks another occurrence.
What to watch for
Common-letter guesses are clues, not proofs, especially in short texts. On Zehano, different cipher letters must map to different plain letters.
Apply it to your own material
Choose one topic from your current course or project. Write down the question you want to answer, make an attempt, and keep a note of how you checked it. Use the example above as a pattern; replace its subject matter and assumptions rather than copying an answer into a different task.
Open Cryptogram ↗