null cipher


null cipher
пустышечный шифр

English-Russian cryptological dictionary . 2014.

Смотреть что такое "null cipher" в других словарях:

  • Null cipher — A null cipher is an ancient form of encryption where the plaintext is mixed with a large amount of non cipher material. It would today be regarded as a simple form of steganography. Null ciphers can also be used to hide ciphertext, as part of a… …   Wikipedia

  • Null — may refer to: Contents 1 In computing 2 In art 3 In mathematics 4 In science 5 People …   Wikipedia

  • Null — Null, n. 1. Something that has no force or meaning. [1913 Webster] 2. That which has no value; a cipher; zero. Bacon. [1913 Webster] {Null method} (Physics.), a zero method. See under {Zero}. [1913 Webster] …   The Collaborative International Dictionary of English

  • Null method — Null Null, n. 1. Something that has no force or meaning. [1913 Webster] 2. That which has no value; a cipher; zero. Bacon. [1913 Webster] {Null method} (Physics.), a zero method. See under {Zero}. [1913 Webster] …   The Collaborative International Dictionary of English

  • null — ► ADJECTIVE 1) (usu. in phrase null and void) having no legal force; invalid. 2) having or associated with the value zero. 3) having no positive substance. ► NOUN 1) a dummy letter in a cipher. 2) Electronics a condition in which no signal is… …   English terms dictionary

  • null method — Zero e ro, n.; pl. {Zeros}or {Zeroes}. [F. z[ e]ro, from Ar. [,c]afrun, [,c]ifrun, empty, a cipher. Cf. {Cipher}.] [1913 Webster] 1. (Arith.) A cipher; nothing; naught. [1913 Webster] 2. The point from which the graduation of a scale, as of a… …   The Collaborative International Dictionary of English

  • null — adj. & n. adj. 1 (esp. null and void) invalid; not binding. 2 non existent; amounting to nothing. 3 having or associated with the value zero. 4 Computing a empty; having no elements (null list). b all the elements of which are zeros (null matrix) …   Useful english dictionary

  • null — adjective 1》 (usu. in phr. null and void) having no legal force; invalid. 2》 having or associated with the value zero.     ↘Mathematics (of a set or matrix) having no elements, or only zeros as elements. 3》 having no positive substance. noun 1》 a …   English new terms dictionary

  • Block cipher modes of operation — This article is about cryptography. For method of operating , see modus operandi. In cryptography, modes of operation is the procedure of enabling the repeated and secure use of a block cipher under a single key.[1][2] A block cipher by itself… …   Wikipedia

  • Cryptanalysis of the Lorenz cipher — The Lorenz SZ machines had 12 wheels each with a different number of cams (or pins). Wheel number 1 2 3 4 5 6 7 …   Wikipedia

  • 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


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