The Alphabet Cipher
The Alphabet Cipher Lewis Carroll published The Alphabet-Cipher in 1868, possibly in a children's ... describes what is known as a Vigenère cipher, a well-known scheme in cryptography. ...
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Talk:The Alphabet Cipher
Talk:The Alphabet Cipher The actual text of Carroll's article ...
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Substitution cipher
Substitution cipher In cryptography, a substitution cipher is a method of encryption by which ... compared with transposition ciphers. In a transposition cipher, units of the plaintext are rearranged in ... left unchanged. By contrast, in a substitution cipher, the units of the plaintext are retained ... a number of different types of substitution cipher. If the cipher operates on single ...
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Caesar cipher
Caesar cipher The action of a Caesar cipher is to move each letter a number of places down the alphabet. This example is with a shift of ... in the ciphertext. In cryptography, a Caesar cipher, also known as a Caesar's cipher or the shift cipher, is one ...
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Vigenère cipher
Vigenère cipher The Vigenère cipher is named for Blaise de Vigenère (pictured ... although Giovan Batista Belaso had invented the cipher earlier. Vigenère did invent a stronger autokey cipher. The Vigenère cipher is a method of encryption that ...
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Shifting cipher   (translated from German)
Shifting cipher Gaius Iulius Caesar That Caesarchiffre (also as simple Caesar, Shift or SHIFT cipher admits) is one monoalphabetical Form that Coding, with that that Alphabet by a certain number of indications rotated ... its military correspondence used. Caesar rotated the alphabet around 3 letters. The procedure becomes Sueton ... remaining." Example: With the key 6 the alphabet would rotate itself as follows: Original: ...
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Polyalphabetic cipher
Polyalphabetic cipher A polyalphabetic cipher is any cipher based on substitution, using multiple substitution alphabets. The Vigenère cipher is probably the best-known example of a polyalphabetic cipher, though it is a simplified special ...
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Playfair cipher
Playfair cipher The Playfair system was invented by Charles ... first described it in 1854. The Playfair cipher or Playfair square is a manual symmetric ... and was the first literal digraph substitution cipher. The scheme was invented in 1854 by ... Playfair who promoted the use of the cipher. The technique encrypts pairs of letters (digraphs ... single letters as in the simple substitution cipher and rather more complex Vigenère cipher ...
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Cipher disk
Cipher disk A cipher disk is an enciphering and deciphering tool ... constructing a table with the regular and cipher alphabets on it, he created two circular ... This enabled him to move the two alphabet scales relative to each other. The cipher disk provided an easy way to ...
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ADFGVX cipher
ADFGVX cipher In cryptography, the ADFGVX cipher was a field cipher used by the German Army during World ... in fact an extension of an earlier cipher called ADFGX. Invented by Colonel Fritz Nebel and introduced in March 1918, the cipher was a fractionating transposition cipher which ...
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