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- Keyword_cipher abstract "A keyword cipher is a form of monoalphabetic substitution. A keyword is used as the key, and it determines the letter matchings of the cipher alphabet to the plain alphabet. Repeats of letters in the word are removed, then the cipher alphabet is generated with the keyword matching to A,B,C etc. until the keyword is used up, whereupon the rest of the ciphertext letters are used in alphabetical order, excluding those already used in the key Worked Example.Plaintext: A B C D E F G H I J K L M N O P Q R S T U V W X Y ZEncrypted: K R Y P T O S A B C D E F G H I J L M N Q U V W X ZWith KRYPTOS as the keyword, all As become Ks, all Bs become Rs and so on. Encrypting the message "knowledge is power" using the keyword "kryptos":Plaintext: K N O W L E D G E I S P O W E REncoded: D G H V E T P S T B M I H V T LOnly one alphabet is used here, so the cipher is monoalphabetic.The best ways to attack a keyword cipher without knowing the keyword are through known-plaintext attack, frequency analysis and discovery of the keyword (often a cryptanalist will combine all three techniques). Keyword discovery allows immediate decryption since the table can be made immediately.".
- Keyword_cipher wikiPageExternalLink keyword?word=knowledgeispower%2Ckryptos.
- Keyword_cipher wikiPageID "6003590".
- Keyword_cipher wikiPageRevisionID "530370531".
- Keyword_cipher hasPhotoCollection Keyword_cipher.
- Keyword_cipher subject Category:Classical_ciphers.
- Keyword_cipher type Abstraction100002137.
- Keyword_cipher type Cipher106254239.
- Keyword_cipher type ClassicalCiphers.
- Keyword_cipher type Communication100033020.
- Keyword_cipher type Message106253690.
- Keyword_cipher comment "A keyword cipher is a form of monoalphabetic substitution. A keyword is used as the key, and it determines the letter matchings of the cipher alphabet to the plain alphabet. Repeats of letters in the word are removed, then the cipher alphabet is generated with the keyword matching to A,B,C etc.".
- Keyword_cipher label "Keyword cipher".
- Keyword_cipher sameAs m.0fk4l6.
- Keyword_cipher sameAs Q6398554.
- Keyword_cipher sameAs Q6398554.
- Keyword_cipher sameAs Keyword_cipher.
- Keyword_cipher wasDerivedFrom Keyword_cipher?oldid=530370531.
- Keyword_cipher isPrimaryTopicOf Keyword_cipher.