Challenging puzzle for experienced crossword solvers
Enigmatic Ciphers and Secret Keys
Moderate difficulty suitable for most players
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Across
- 1. Polyalphabetic cipher using a keyword to shift letters
- 5. Complex World War II machine for coded messages
Down
- 2. Cipher type replacing letters with others systematically
- 3. Famous Roman shift cipher named after a leader
- 4. Action to shift letters in a simple cipher
- 6. Opposite of cipher text; original readable message
- 7. Input device often used to encode digit sequences
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