Cryptography Stack Exchange
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Questions tagged [playfair]

The Playfair cipher is a digraph substitution cipher. It employs a table where one letter of the alphabet is omitted, and the letters are arranged in a 5x5 grid.

The Playfair cipher is a digraph substitution cipher. It employs a table where one letter of the alphabet is omitted, and the letters are arranged in a 5x5 grid. To fit the grid, the J is removed from the alphabet and an I takes its place in the text that is to be encoded.

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Decoding the Playfair cipher with a crib

I have a Playfair cipher text and I know a portion of the text (one world). How can I decode the cipher from here? Thanks.
Robert Sandu
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Key derivation using known parameters of playfair

Is it possible to derive the key, for a playfair cipher, if both the message and cipher text are known?
Edward
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encryption of message "DATACONFANTIALITY" with key playfair using playfair cipher

actually i have solved the above mentioned problem but i want to check weather it is correct or not. my question is that how to encrypt the message DATACONFANTIALITY using the playfair cipher where the key is playfair
pooja
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