Playfair
English
    
    
Derived terms
    
- Playfair cipher
- Playfairian
- playfairite
Noun
    
Playfair (uncountable)
- (cryptography) the Playfair cipher, or an encryption using it
-  1932, Sayers, Dorothy, Have His Carcase:- Here's a cipher message. Probably Playfair.
 
 
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