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- Playfair_cipher abstract "The Playfair cipher or Playfair square is a manual symmetric encryption technique and was the first literal digraph substitution cipher. The scheme was invented in 1854 by Charles Wheatstone, but bears the name of Lord Playfair who promoted the use of the cipher.The technique encrypts pairs of letters (digraphs), 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. Frequency analysis can still be undertaken, but on the 600 possible digraphs rather than the 26 possible monographs. The frequency analysis of digraphs is possible, but considerably more difficult – and it generally requires a much larger ciphertext in order to be useful.".
- Playfair_cipher thumbnail Charles_Wheatstone_-_Project_Gutenberg_etext_13103.jpg?width=300.
- Playfair_cipher wikiPageExternalLink playfair_cipher.html.
- Playfair_cipher wikiPageExternalLink fm-34-40-2.
- Playfair_cipher wikiPageExternalLink lect3.htm.
- Playfair_cipher wikiPageID "173586".
- Playfair_cipher wikiPageRevisionID "602262308".
- Playfair_cipher hasPhotoCollection Playfair_cipher.
- Playfair_cipher subject Category:Classical_ciphers.
- Playfair_cipher subject Category:English_inventions.
- Playfair_cipher type Ability105616246.
- Playfair_cipher type Abstraction100002137.
- Playfair_cipher type Cipher106254239.
- Playfair_cipher type ClassicalCiphers.
- Playfair_cipher type Cognition100023271.
- Playfair_cipher type Communication100033020.
- Playfair_cipher type Creativity105624700.
- Playfair_cipher type EnglishInventions.
- Playfair_cipher type Invention105633385.
- Playfair_cipher type Message106253690.
- Playfair_cipher type PsychologicalFeature100023100.
- Playfair_cipher comment "The Playfair cipher or Playfair square is a manual symmetric encryption technique and was the first literal digraph substitution cipher. The scheme was invented in 1854 by Charles Wheatstone, but bears the name of Lord Playfair who promoted the use of the cipher.The technique encrypts pairs of letters (digraphs), instead of single letters as in the simple substitution cipher and rather more complex Vigenère cipher systems then in use.".
- Playfair_cipher label "Chiffre de Playfair".
- Playfair_cipher label "Cifra Playfair".
- Playfair_cipher label "Cifrado de Playfair".
- Playfair_cipher label "Cifrario Playfair".
- Playfair_cipher label "Playfair cipher".
- Playfair_cipher label "Playfair".
- Playfair_cipher label "Playfaircijfer".
- Playfair_cipher label "Szyfr Playfair".
- Playfair_cipher label "Шифр Плейфера".
- Playfair_cipher label "波雷費密碼".
- Playfair_cipher sameAs Playfairova_šifra.
- Playfair_cipher sameAs Playfair.
- Playfair_cipher sameAs Κρυπτοσύστημα_Playfair.
- Playfair_cipher sameAs Cifrado_de_Playfair.
- Playfair_cipher sameAs Chiffre_de_Playfair.
- Playfair_cipher sameAs Sandi_Playfair.
- Playfair_cipher sameAs Cifrario_Playfair.
- Playfair_cipher sameAs Playfaircijfer.
- Playfair_cipher sameAs Szyfr_Playfair.
- Playfair_cipher sameAs Cifra_Playfair.
- Playfair_cipher sameAs m.017dww.
- Playfair_cipher sameAs Q829915.
- Playfair_cipher sameAs Q829915.
- Playfair_cipher sameAs Playfair_cipher.
- Playfair_cipher wasDerivedFrom Playfair_cipher?oldid=602262308.
- Playfair_cipher depiction Charles_Wheatstone_-_Project_Gutenberg_etext_13103.jpg.
- Playfair_cipher isPrimaryTopicOf Playfair_cipher.
