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Playfair Cipher

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The technique encrypts pairs of letters (bigrams or digrams), instead of single letters as in the simple substitution cipher and rather more complex Vigenère cipher systems then in use. The Playfair is thus significantly harder to break since the frequency analysis used for simple substitution ciphers does not work with it<ref>https://en.wikipedia.org/wiki/Playfair_cipher</ref>.
 
The technique encrypts pairs of letters (bigrams or digrams), instead of single letters as in the simple substitution cipher and rather more complex Vigenère cipher systems then in use. The Playfair is thus significantly harder to break since the frequency analysis used for simple substitution ciphers does not work with it<ref>https://en.wikipedia.org/wiki/Playfair_cipher</ref>.
 
The playfair cipher used in the movie was [[ME IK QO TX CQ TE ZX CO MW QC TE HN FB IK ME HA KR QC UN GI KM AV]] with a keyword "DEATH" given as a riddle: "[[The debt that all men pay]]".
 
   
 
==References==
 
==References==
 
<references/>
 
<references/>
 
[[Category:Book of Secrets Clues]]
 
[[Category:Book of Secrets Clues]]
[[Category:Book of Secrets]]
 
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