enciphered code
11Colossus computer — Colossus MkI/MkII A Colossus Mark 2 computer. The operator on the left is Dorothy Duboisson. The slanted control panel on the left was used to set the pin patterns on the Lorenz. The bedstead paper tape transport is on the right. Developer Tommy… …
12Substitution 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,… …
13Biuro Szyfrów — The Biuro Szyfrów ([ˈbʲurɔ ˈʂɨfruf] ( listen), Polish for Cipher Bureau ) was the interwar Polish General Staff s agency charged with both cryptography (the use of ciphers and codes) and cryptology (the study of ciphers and codes,… …
14Room 40 — Admiralty Ripley building In Whitehall, built in 1726 and still used for naval board meetings. Room 40 was in the northern section of the first floor, on the same corridor as the boardroom and First Sea Lord s office. In the history of… …
15Fish (cryptography) — For the (Fibonacci Shrinking) stream cipher published in 1993, see FISH (cipher). Fish (sometimes FISH) was the Allied codename for any of several German teleprinter stream ciphers used during World War II [Wolfgang W. Mache, Geheimschreiber (… …
16Vigenère 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 )… …
17Cryptanalysis 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 …
18Magic (cryptography) — Magic was an Allied cryptanalysis project during World War II. It involved the United States Army s Signals Intelligence Section (SIS) and the United States Navy s Communication Special Unit. [1] Contents 1 Codebreaking 1.1 RED …
19Marian Rejewski — (probably 1932, the year he first solved the Enigma machine). Courtesy of Janina Sylwestrzak, Rejewski s daughter. Born Marian Adam Rejewski August 16, 1905(1905 0 …
20Signals Intelligence — (SIGINT) The tsarist regime maintained a sophisticated signals intelligence capability. Both the Okhrana and the Foreign Ministry worked to break the codes of radical groups and foreign powers. A British diplomat was warned by a Russian… …
