Substitution cipher: worksheet
Print this worksheet for your students: it has the key, a message to decode and one to encode. Add the answer key for yourself.
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Worksheet · Substitution cipher
Substitution cipher: worksheet
NameDate
How it works
Write the key under the alphabet: each letter becomes the one below it. To decode, go back up.
Key
| Letter | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Becomes | Z | E | B | R | A | S | C | D | F | G | H | I | J | K | L | M | N | O | P | Q | T | U | V | W | X | Y |
Exercises
Decode this message.
QDA QOAZPTOA FP TKRAO QDA PQZFOP
Your answer
Encode this message.
WE ESCAPED JUST IN TIME
Your answer