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- Unicity_distance abstract "In cryptography, unicity distance is the length of an original ciphertext needed to break the cipher by reducing the number of possible spurious keys to zero in a brute force attack. That is, after trying every possible key, there should be just one decipherment that makes sense, i.e. expected amount of ciphertext needed to determine the key completely, assuming the underlying message has redundancy. Consider an attack on the ciphertext string "WNAIW" encrypted using a Vigenère cipher with a five letter key. Conceivably, this string could be deciphered into any other string — RIVER and WATER are both possibilities for certain keys. This is a general rule of cryptanalysis: with no additional information it is impossible to decode this message.Of course, even in this case, only a certain number of five letter keys will result in English words. Trying all possible keys we will not only get RIVER and WATER, but SXOOS and KHDOP as well. The number of "working" keys will likely be very much smaller than the set of all possible keys. The problem is knowing which of these "working" keys is the right one; the rest are spurious.".
- Unicity_distance wikiPageExternalLink unicity-distance.
- Unicity_distance wikiPageExternalLink plaintext.
- Unicity_distance wikiPageID "71630".
- Unicity_distance wikiPageRevisionID "559694273".
- Unicity_distance hasPhotoCollection Unicity_distance.
- Unicity_distance subject Category:Cryptography.
- Unicity_distance subject Category:Information_theory.
- Unicity_distance comment "In cryptography, unicity distance is the length of an original ciphertext needed to break the cipher by reducing the number of possible spurious keys to zero in a brute force attack. That is, after trying every possible key, there should be just one decipherment that makes sense, i.e. expected amount of ciphertext needed to determine the key completely, assuming the underlying message has redundancy.".
- Unicity_distance label "Distance d'unicité".
- Unicity_distance label "Distancia de unicidad".
- Unicity_distance label "Distanza di unicità".
- Unicity_distance label "Unicity distance".
- Unicity_distance label "Расстояние единственности".
- Unicity_distance sameAs Distancia_de_unicidad.
- Unicity_distance sameAs Distance_d'unicité.
- Unicity_distance sameAs Distanza_di_unicità.
- Unicity_distance sameAs m.0jf99.
- Unicity_distance sameAs Q1640661.
- Unicity_distance sameAs Q1640661.
- Unicity_distance wasDerivedFrom Unicity_distance?oldid=559694273.
- Unicity_distance isPrimaryTopicOf Unicity_distance.