double transposition cipher

См. также в других словарях:

• Transposition cipher — In cryptography, a transposition cipher is a method of encryption by which the positions held by units of plaintext (which are commonly characters or groups of characters) are shifted according to a regular system, so that the ciphertext… …   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

• 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

• VIC cipher — The VIC cipher was a pencil and paper cipher used by the Soviet spy Reino Häyhänen, codenamed VICTOR . FAQ It was arguably the most complex hand operated cipher ever seen, when it was first discovered. The initial analysis done by the NSA in 1953 …   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

• Leo Marks — Leopold Samuel Marks (24 September 1920 ndash; 15 January 2001) was an English cryptographer and scriptwriter.Early lifeBorn the son of an antiquarian bookseller in London, he was first introduced to cryptography when his father showed him a copy …   Wikipedia

• шифр двойной перестановки — — [http://www.rfcmd.ru/glossword/1.8/index.php?a=index d=23] Тематики защита информации EN double transposition cipher …   Справочник технического переводчика

• cryptology — cryptologist, n. cryptologic /krip tl oj ik/, cryptological, adj. /krip tol euh jee/, n. 1. cryptography. 2. the science and study of cryptanalysis and cryptography. [1635 45; < NL cryptologia. See CRYPTO , LOGY] * * * Introduction …   Universalium

• History of cryptography — The history of cryptography begins thousands of years ago. Until recent decades, it has been the story of what might be called classic cryptography that is, of methods of encryption that use pen and paper, or perhaps simple mechanical aids. In… …   Wikipedia

• Список эпизодов сериала «4исла» — «4исла» (англ. Numb3rs)  детективный телевизионный сериал, созданный Николасом Фалаччи и Шерил Хьютон. Премьера телесериала состоялась 23 января 2005 года, 18 мая 2010 года CBS закрыл сериал …   Википедия

• Poem code — The poem code is a simple, and insecure, cryptographic method.The method works by the sender and receiver pre arranging a poem to use. The sender chooses a set number of words at random from the poem and gives each letter in the chosen words a… …   Wikipedia