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Key terms: playfair cipher pair key letters row z table replace message digraphs plaintext playfair cipher break encryption square column possible contain keyword frequency crossword rules hence wheatstone ciphertext forms a rectangle pattern key table relatively generate sayers same row manual cryptanalysis corners substitution solution alphabet promoted candidate first letter respectively lord playfair original pair if the letters playfair system charles wheatstone frequency analysis replace them with the letters Search external links cited by footnotes on Wikipedia page Playfair cipher: |
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