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- Contact_analysis_(cryptanalysis) abstract "In cryptanalysis, contact analysis is the study of the frequency with which certain symbols precede or follow other symbols. The method is used as an aid to breaking classical ciphers.Contact analysis is based on the fact that, in any sample of any written language, certain symbols appear adjacent to other symbols with varying frequencies. Moreover, these frequencies are roughly the same for almost all samples of that language, even when the distribution of the symbols themselves differs significantly from normal. This is true regardless of whether the symbols being used are words or letters.In some ciphers, these properties of the natural language plaintext are preserved in the ciphertext, and have the potential to be exploited in a ciphertext-only attack.Although in a sense contact analysis can be considered a type of frequency analysis, most discussions of frequency analysis concern themselves with the simple probabilities of the symbols in the text: or Contact analysis is based on the conditional probability that certain letters will precede or succeed other letters: , or , or even , where and are subsets of the alphabet being used.Where frequency analysis is based on first-order statistics, contact analysis is based on second or third-order statistics.".
- Contact_analysis_(cryptanalysis) wikiPageExternalLink english.html.
- Contact_analysis_(cryptanalysis) wikiPageID "14486776".
- Contact_analysis_(cryptanalysis) wikiPageRevisionID "601782716".
- Contact_analysis_(cryptanalysis) hasPhotoCollection Contact_analysis_(cryptanalysis).
- Contact_analysis_(cryptanalysis) subject Category:Cryptographic_attacks.
- Contact_analysis_(cryptanalysis) type Abstraction100002137.
- Contact_analysis_(cryptanalysis) type Act100030358.
- Contact_analysis_(cryptanalysis) type Activity100407535.
- Contact_analysis_(cryptanalysis) type Attack100972621.
- Contact_analysis_(cryptanalysis) type CryptographicAttacks.
- Contact_analysis_(cryptanalysis) type Event100029378.
- Contact_analysis_(cryptanalysis) type Operation100955060.
- Contact_analysis_(cryptanalysis) type PsychologicalFeature100023100.
- Contact_analysis_(cryptanalysis) type YagoPermanentlyLocatedEntity.
- Contact_analysis_(cryptanalysis) comment "In cryptanalysis, contact analysis is the study of the frequency with which certain symbols precede or follow other symbols. The method is used as an aid to breaking classical ciphers.Contact analysis is based on the fact that, in any sample of any written language, certain symbols appear adjacent to other symbols with varying frequencies.".
- Contact_analysis_(cryptanalysis) label "Contact analysis (cryptanalysis)".
- Contact_analysis_(cryptanalysis) sameAs m.03d50nn.
- Contact_analysis_(cryptanalysis) sameAs Q5164819.
- Contact_analysis_(cryptanalysis) sameAs Q5164819.
- Contact_analysis_(cryptanalysis) sameAs Contact_analysis_(cryptanalysis).
- Contact_analysis_(cryptanalysis) wasDerivedFrom Contact_analysis_(cryptanalysis)?oldid=601782716.
- Contact_analysis_(cryptanalysis) isPrimaryTopicOf Contact_analysis_(cryptanalysis).