Vigenere cipher

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• Vigenère cipher — The Vigenère cipher is a method of encrypting alphabetic text by using a series of different Caesar ciphers based on the letters of a keyword. It is a simple form of polyalphabetic substitution.The Vigenère (pronEng|ˌviːdʒɪˈnɛəɹ, veedj ih nair )… …   Wikipedia

• vigenère cipher — |vēzhə|ne(ə)r noun Usage: usually capitalized V Etymology: after Blaise de Vigénère died 1596 French diplomat and student of cryptography : polyalphabetic substitution with alphabets derived from one pair of primary alphabets by sliding (as in… …   Useful english dictionary

• Vigenère — can be: *Blaise de Vigenère, a 16th century French cryptographer *The Vigenère cipher, a cipher whose invention was later misattributed to Vigenère …   Wikipedia

• vigenère tableau — noun also vigenère table or vigenère square Usage: usually capitalized V Etymology: after B. de Vigénère : a square cipher table formed by placing the same normal or mixed primary alphabet one step farther to the left on each successive line and… …   Useful english dictionary

• cipher square — noun : vigenère tableau …   Useful english dictionary

• Substitution cipher — In cryptography, a substitution cipher is a method of encryption by which units of plaintext are replaced with ciphertext according to a regular system; the units may be single letters (the most common), pairs of letters, triplets of letters,… …   Wikipedia

• Classical cipher — A cipher is a means of concealing a message, where letters of the message are substituted or transposed for other letters, letter pairs, and sometimes for many letters. In cryptography, a classical cipher is a type of cipher that was used… …   Wikipedia

• Caesar cipher — The action of a Caesar cipher is to replace each plaintext letter with one fixed number of places down the alphabet. This example is with a shift of three, so that a B in the p …   Wikipedia

• Blaise de Vigenère — (April 5, 1523 1596) was a French diplomat and cryptographer. The Vigenère cipher is so named due to the cipher being incorrectly attributed to him in the 19th century.Vigenère (IPA: viːdʒ ɪ nɛəɹ veez ih nair ) was born in the village of Saint… …   Wikipedia

• Beaufort cipher — The Beaufort cipher, created by Sir Francis Beaufort, is a substitution cipher that is similar to the Vigenère cipher but uses a slightly modified enciphering mechanism and tableau.Using the cypherTo encrypt (or decrypt for that matter), first… …   Wikipedia

• National Cipher Challenge — The National Cipher Challenge is an annual cryptographic competition organised by the University of Southampton School of Mathematics. Competitors attempt to break cryptograms published on the competition website. In the 2007/08 challenge, 1301… …   Wikipedia