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Purple Code
The "System 97 Typewriter for European Characters" (九七式欧文印字機 ''kyūnana-shiki ōbun injiki'') or "Type B Cipher Machine", codenamed Purple by the United States, was an encryption machine used by the Japanese Foreign Office from February 1939 to the end of World War II. The machine was an electromechanical device that used stepping-switches to encrypt the most sensitive diplomatic traffic. All messages were written in the 26-letter English alphabet, which was commonly used for telegraphy. Any Japanese text had to be transliterated or coded. The 26-letters were separated using a plug board into two groups, of six and twenty letters respectively. The letters in the sixes group were scrambled using a 6 × 25 substitution table, while letters in the twenties group were more thoroughly scrambled using three successive 20 × 25 substitution tables. The cipher codenamed "Purple" replaced the Type A Red machine previously used by the Japanese Foreign Office. The si ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Purple Cipher Machine Analog Bw Photo NCM
Purple is a color similar in appearance to Violet (color), violet light. In the RYB color model historically used in the arts, purple is a secondary color created by combining red and blue pigments. In the CMYK color model used in modern printing, purple is made by combining magenta pigment with either cyan pigment, black pigment, or both. In the RGB color model used in computer and television screens, purple is created by Additive color, mixing red and blue light in order to create colors that appear similar to violet light. According to color theory, purple is considered a cool color. Purple has long been associated with royalty, originally because Tyrian Purple, Tyrian purple dye—made from the secretions of sea snails—was extremely expensive in antiquity. Purple was the color worn by Roman magistrates; it became the imperial color worn by the rulers of the Byzantine Empire and the Holy Roman Empire, and later by Roman Catholic bishops. Similarly in Japan, the color is tr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Teiji Takagi
Teiji Takagi (高木 貞治 ''Takagi Teiji'', April 21, 1875 – February 28, 1960) was a Japanese mathematician, best known for proving the Takagi existence theorem in class field theory. The Blancmange curve, the graph of a nowhere-differentiable but uniformly continuous function, is also called the Takagi curve after his work on it. Biography He was born in the rural area of the Gifu Prefecture, Japan. He began learning mathematics in middle school, reading texts in English since none were available in Japanese. After attending a high school for gifted students, he went on to the Imperial University (University of Tokyo), at that time the only university in Japan before the Imperial University System was established on June 18, 1897. There he learned mathematics from such European classic texts as Salmon's ''Algebra'' and Weber's ''Lehrbuch der Algebra''. Aided by Hilbert, he then studied at Göttingen. Aside from his work in algebraic number theory he wrote a great num ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kana
are syllabary, syllabaries used to write Japanese phonology, Japanese phonological units, Mora (linguistics), morae. In current usage, ''kana'' most commonly refers to ''hiragana'' and ''katakana''. It can also refer to their ancestor , which were Kanji, Chinese characters used phonetically to transcribe Japanese language, Japanese (e.g. ''man'yōgana''); and ''hentaigana'', which are historical variants of the now-standard hiragana. Katakana, with a few additions, are also used to write Ainu language, Ainu. A Okinawan scripts, number of systems exist to write the Ryūkyūan languages, in particular Okinawan language, Okinawan, in hiragana. Taiwanese kana were used in Taiwanese Hokkien as ruby text for Chinese characters in Taiwan when it was Taiwan under Japanese rule, under Japanese rule. Each syllabogram, kana character corresponds to one phoneme or syllable, unlike kanji, which generally each logogram, corresponds to a morpheme. Apart from the five vowels, it is always ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rotor (electric)
The rotor is a moving component of an electromagnetic system in the electric motor, electric generator, or alternator. Its rotation is due to the interaction between the windings and magnetic fields which produces a torque around the rotor's axis.Staff. "Understanding Alternators. What Is an Alternator and How Does It Work." N.p., n.d. Web. 24 November 2014 . Early development An early example of electromagnetic rotation was the first rotary machine built by Ányos Jedlik with electromagnets and a commutator, in 1826-27. Other pioneers in the field of electricity include Hippolyte Pixii who built an alternating current generator in 1832, and William Ritchie's construction of an electromagnetic generator with four rotor coils, a commutator and brushes, also in 1832. Development quickly included more useful applications such as Moritz Hermann Jacobi's motor that could lift 10 to 12 pounds with a speed of one foot per second, about 15 watts of mechanical power in 1834. In 18 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Japanese Imperial Year
The , colloquially known as the or "national calendar year" is a unique calendar system in Japan. It is based on the legendary foundation of Japan by Emperor Jimmu in 660 BC. emphasizes the long history of Japan and the Imperial dynasty. The Gregorian year 2025 is Kōki 2685. History dating was used as early as 1872, shortly after Japan adopted the Gregorian calendar and was popular during the life of the Meiji Constitution (1890–1947). Its use was promoted by the scholars of kokugaku in the late 19th century. The Summer Olympics and Tokyo Expo were planned as anniversary events in 1940 (); but the international games were not held because of the Second Sino-Japanese War. The Imperial Japanese Army (IJA, from 1927) and Imperial Japanese Navy (IJN, from 1929) used the system for identification. For example many Japanese names circa World War II use imperial years: * The IJA's Type 92 battalion gun was called "ninety-two" because its design was completed in 1932, and the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plugboard
A plugboard or control panel (the term used depends on the application area) is an array of jack (connector), jacks or sockets (often called hubs) into which patch cords can be inserted to complete an electrical circuit. Control panels are sometimes used to direct the operation of unit record equipment, :Cryptographic hardware, cipher machines, and History of computing hardware#Digital computation, early computers. The array of holes is often contained in a flat removable panel that can be inserted into a machine and pressed against an array of contacts. This allows the machine to be quickly switched between different applications. The contacts on the machine are hard wired to the various devices that comprise the machine, such as relays, counters, inputs from each card reader column, outputs to a card punch column or printer position, and so on. The wiring on a plugboard connects these devices to perform a specific function, say reading cards and summing up the numbers punched ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kryha
In the history of cryptography, the Kryha machine was a device for encryption and decryption, appearing in the early 1920s and used until the 1950s. The machine was the invention of (born 31.10.1891 in Charkow, Russian Empire, committed suicide in Baden-Baden in 1955). During the Second World War, Kryha worked as an officer for the German Wehrmacht. There were several versions; the standard Kryha machine weighed around five kilograms, and was totally mechanical. A scaled down pocket version was introduced later on, termed the "Lilliput" model. There was also a more bulky electrical version. The machine was used for a time by the German Diplomatic Corps, and was adopted by Marconi in England. Operation The machine consisted of two concentric rings each containing an alphabet. The inner alphabet was stepped a variable number of places by pushing a lever. In operation, the user would encrypt by finding the plaintext letter on one ring (usually the outer ring), and reading the cor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kazuo Tanabe
Kazuo (カズオ, かずお) is a masculine Japanese given name. Possible spellings It has several written forms, and the meaning depends on the characters used (usually kanji, but sometimes hiragana). Common forms include: * 一雄: first son, first in leadership/excellence * 一夫: first son * 一男: first man/male * 和夫: harmonious/peaceful man * 和男: harmonious/peaceful man * かずお (hiragana) * カズオ (katakana) People with the name *, Japanese sport wrestler *, Japanese politician *, Japanese government minister during the Second Sino-Japanese War, and into World War II *, Japanese shogi player *, Japanese aikido teacher *, Japanese novelist and poet * Kazuo Endo, Kobe earthquake survivor *, Japanese Marxist *, Japanese Enka singer *, Japanese documentary film director *, anime producer, audio director, and sound effects director *, Japanese film and stage actor *, late Japanese inventor of Caller ID and the telephone answering machine, including the ansafone ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
London Naval Treaty
The London Naval Treaty, officially the Treaty for the Limitation and Reduction of Naval Armament, was an agreement between the United Kingdom, Empire of Japan, Japan, French Third Republic, France, Kingdom of Italy, Italy, and the United States that was signed on 22 April 1930. Seeking to address issues not covered in the 1922 Washington Naval Treaty, which had created tonnage limits for each nation's Surface combatant, surface warships, the new agreement regulated submarine warfare, further controlled cruisers and destroyers, and limited naval shipbuilding. Ratifications were exchanged in London on 27 October 1930, and the treaty went into effect on the same day, but it was largely ineffective. The treaty was registered in ''Treaty series#League of Nations, League of Nations Treaty Series'' on 6 February 1931. Conference The signing of the treaty remains inextricably intertwined with the ongoing negotiations, which began before the official start of the London Naval Confer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Black Chamber
The Black Chamber, officially the Cable and Telegraph Section and also known as the Cipher Bureau, was the first peacetime cryptanalytic organization in the United States, operating from 1917 to 1929. It was a forerunner of the National Security Agency (NSA). History Until World War I, the only codes and cypher organizations created by the U.S. government were short-lived agencies of the United States Armed Forces, such as the U.S. Army's Military Intelligence (MI-8). The Cable and Telegraph Section or Cipher Bureau was established on April 28, 1917, three weeks after the U.S. Congress declared war on the German Empire and began American involvement in World War I. It was headquartered in Washington, D.C., operated under the executive branch without direct Congressional authorization, and was moved in the Army's organizational chart several times. On July 5, 1917, Herbert O. Yardley was assigned to head the Cipher Bureau, which consisted of Yardley and two civilian clerk ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
