Useful english dictionary. 2012.
Wheatstone, Sir Charles — ▪ British physicist born Feb. 6, 1802, Gloucester, Gloucestershire, Eng. died Oct. 19, 1875, Paris English physicist who popularized the Wheatstone bridge, a device that accurately measured electrical resistance and became widely used in… … Universalium
Charles Wheatstone — Wheatstone, drawn by Samuel Laurence in 1868 Born 6 … Wikipedia
Playfair cipher — The Playfair cipher or Playfair square is a manual symmetric encryption technique and was the first literal digraph substitution cipher. The scheme was invented in 1854 by Charles Wheatstone, but bears the name of Lord Playfair who promoted the… … Wikipedia
Charles Wheatstone — Sir Charles Wheatstone [ˈwiːtstən] (* 6. Februar 1802 in Gloucester; † 19. Oktober 1875 in Paris) war ein britischer Physiker … Deutsch 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
Wadsworth's cipher — was a cipher invented by Decius Wadsworth, a Colonel in the Ordnance Corps of the United States Army. In 1817, he developed a progressive cipher system based on a 1790 design by Thomas Jefferson, establishing a method that was continuously… … Wikipedia
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
Frequency analysis — In cryptanalysis, frequency analysis is the study of the frequency of letters or groups of letters in a ciphertext. The method is used as an aid to breaking classical ciphers.this is wrong is based on the fact that, in any given stretch of… … Wikipedia
Topics in cryptography — This article is intended to be an analytic glossary , or alternatively, an organized collection of annotated pointers.Classical ciphers*Autokey cipher *Permutation cipher*Polyalphabetic substitution **Vigenère cipher*Polygraphic substitution… … Wikipedia
Timeline of cryptography — Below is a timeline of notable events related to cryptography.BCE *3500s The Sumerians develop cuneiform writing and the Egyptians develop hieroglyphic writing. *1500s The Phoenicians develop an alphabet *600 500 Hebrew scholars make use of… … Wikipedia
