Last Updated
：2025/11/29
Playfair cipher
（ plural ）
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A manual symmetric encryption technique that encrypts pairs of letters (digraphs).
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Playfair cipher
To teach students about historical cryptography, the professor demonstrated the Playfair cipher by showing how to encrypt pairs of letters on the blackboard.
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To teach students about historical cryptography, the professor demonstrated the Playfair cipher by showing how to encrypt pairs of letters on the blackboard.
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