|
MI1b
MI1 or British ''Military Intelligence, Section 1'' was a department of the British Directorate of Military Intelligence, part of the War Office. It was set up during World War I. It contained "C&C", which was responsible for code breaking. Its subsections in World War I were; * MI1a: Distribution of reports, intelligence records. * MI1b: Interception and cryptanalysis. * MI1c: The Secret Service/SIS. * MI1d: Communications security. * MI1e: Wireless telegraphy. * MI1f: Personnel and finance. * MI1g: Security, deception and counter intelligence. From 1915, MI1(b) was headed by Malcolm Vivian Hay. Oliver Strachey was in MI1 during World War I. He transferred to the Government Code and Cypher School and served there during World War II. John Tiltman was seconded to MI1 shortly before it merged with Room 40. In 1919 MI1b and the Royal Navy's (NID25) "Room 40" were closed down and merged into the inter-service Government Code and Cypher School, which subsequently developed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Government Communications Headquarters
Government Communications Headquarters (GCHQ) is an intelligence and security organisation responsible for providing signals intelligence (SIGINT) and information assurance (IA) to the government and armed forces of the United Kingdom. Primarily based at The Doughnut in the suburbs of Cheltenham, GCHQ is the responsibility of the country's Secretary of State for Foreign and Commonwealth Affairs (Foreign Secretary), but it is not a part of the Foreign Office and its director ranks as a Permanent Secretary. GCHQ was originally established after the First World War as the Government Code and Cypher School (GC&CS) and was known under that name until 1946. During the Second World War it was located at Bletchley Park, where it was responsible for breaking the German Enigma codes. There are two main components of GCHQ, the Composite Signals Organisation (CSO), which is responsible for gathering information, and the National Cyber Security Centre (NCSC), which is responsible for s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Directorate Of Military Intelligence (United Kingdom)
The Directorate of Military Intelligence (DMI) was a department of the United Kingdom of Great Britain and Ireland, British War Office. Over its lifetime the Directorate underwent a number of organisational changes, absorbing and shedding sections over time. History The first instance of an organisation which would later become the DMI was the Department of Topography & Statistics, formed by Major Thomas Best Jervis, late of the Bombay Engineer Group, Bombay Engineer Corps, in 1854 in the early stages of the Crimean War. In 1873 the Intelligence Branch was created within the Quartermaster General's Department with an initial staff of seven officers. Initially the Intelligence Branch was solely concerned with collecting intelligence, but under the leadership of Henry Brackenbury, a protege of influential Adjutant-General Garnet Wolseley, 1st Viscount Wolseley, Lord Wolseley, it was increasingly concerned with planning. However, despite these steps towards a nascent general ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Government Code And Cypher School
The Government Code and Cypher School (GC&CS) was a British signals intelligence agency set up in 1919. During the First World War, the British Army and Royal Navy had separate signals intelligence agencies, MI1b and NID25 (initially known as Room 40) respectively. It was particularly known for its work on codebreaking at Bletchley Park and after the war became the Government Communications Headquarters (GCHQ). Interwar period In 1919, the Cabinet's Secret Service Committee, chaired by Lord Curzon, recommended that a peacetime codebreaking agency should be created, a task which was given to the Director of Naval Intelligence, Hugh Sinclair.Johnson, 1997, p. 44 Sinclair merged staff from NID25 and MI1b into the new organisation, which initially consisted of around 25–30 officers and a similar number of clerical staff. It was titled the "Government Code and Cypher School" (GC&CS), a cover-name which was chosen by Victor Forbes of the Foreign Office. Alastair Denniston, who h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Room 40
Room 40, also known as 40 O.B. (old building; officially part of NID25), was the cryptanalysis section of the British Admiralty during the First World War. The group, which was formed in October 1914, began when Rear-Admiral Henry Oliver, the Director of Naval Intelligence, gave intercepts from the German radio station at Nauen, near Berlin, to Director of Naval Education Alfred Ewing, who constructed ciphers as a hobby. Ewing recruited civilians such as William Montgomery, a translator of theological works from German, and Nigel de Grey, a publisher. It was estimated that during the war Room 40 decrypted around 15,000 intercepted German communications from wireless and telegraph traffic. Most notably the section intercepted and decoded the Zimmermann Telegram, a secret diplomatic communication issued from the German Foreign Office in January 1917 that proposed a military alliance between Germany and Mexico. Its decoding has been described as the most significant intellig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
War Office
The War Office has referred to several British government organisations throughout history, all relating to the army. It was a department of the British Government responsible for the administration of the British Army between 1857 and 1964, at which point its functions were transferred to the new Ministry of Defence (United Kingdom), Ministry of Defence (MoD). This article contains text from this source, which is available under th Open Government Licence v3.0 © Crown copyright It was equivalent to the Admiralty (United Kingdom), Admiralty at that time, which was responsible for the Royal Navy (RN), and (much later) the Air Ministry, which oversaw the Royal Air Force (RAF). The name 'Old War Office' is also given to the former home of the department, located at the junction of Horse Guards Avenue and Whitehall in central London. The landmark building was sold on 1 March 2016 by HM Government for more than British pound, £350 million, on a 250-year lease for conversion int ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
World War I Cryptography
With the rise of easily-intercepted wireless telegraphy, codes and ciphers were used extensively in World War I. The decoding by British Naval intelligence of the Zimmermann telegram helped bring the United States into the war. Trench codes were used by field armies of most of the combatants (Americans, British, French, German) in World War I. The most commonly used codes were simple substitution ciphers. More important messages generally used mathematical encryption for extra security. The use of these codes required the distribution of codebooks to military personnel, which proved to be a security liability since these books could be stolen by enemy forces. Britain British decrypting was carried out in Room 40 by the Royal Navy and in MI1 by British Military (Army) Intelligence. * Zimmermann telegram * Arthur Zimmermann * MI1 British Military (Army) Intelligence * Room 40 Royal Navy (Britain) * Alastair Denniston Room 40 * James Alfred Ewing Room 40, first head * Nigel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cryptanalysis
Cryptanalysis (from the Greek ''kryptós'', "hidden", and ''analýein'', "to analyze") refers to the process of analyzing information systems in order to understand hidden aspects of the systems. Cryptanalysis is used to breach cryptographic security systems and gain access to the contents of encrypted messages, even if the cryptographic key is unknown. In addition to mathematical analysis of cryptographic algorithms, cryptanalysis includes the study of side-channel attacks that do not target weaknesses in the cryptographic algorithms themselves, but instead exploit weaknesses in their implementation. Even though the goal has been the same, the methods and techniques of cryptanalysis have changed drastically through the history of cryptography, adapting to increasing cryptographic complexity, ranging from the pen-and-paper methods of the past, through machines like the British Bombes and Colossus computers at Bletchley Park in World War II, to the mathematically advanced ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Secret Intelligence Service
The Secret Intelligence Service (SIS), commonly known as MI6 (MI numbers, Military Intelligence, Section 6), is the foreign intelligence service of the United Kingdom, tasked mainly with the covert overseas collection and analysis of Human intelligence (intelligence gathering), human intelligence on foreign nationals in support of its Five Eyes partners. SIS is one of the British intelligence agencies and the Chief of the Secret Intelligence Service ("C") is directly accountable to the Foreign Secretary (United Kingdom), Foreign Secretary. Formed in 1909 as the foreign section of the Secret Service Bureau, the section grew greatly during the World War I, First World War, officially adopting its current name around 1920. The name "MI6" originated as a convenient label during the World War II, Second World War, when SIS was known by many names. It is still commonly used today. The existence of SIS was not officially acknowledged until 1994. That year the Intelligence Services A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Malcolm Vivian Hay
Major Malcolm Vivian Hay of Seaton (1881–1962) was an officer in the Gordon Highlanders, a cryptographer during the First World War, a historian of Catholic and Jewish history, and the last Laird of Seaton House in Aberdeen, Scotland. The grounds of the estate are now Seaton Park. Early life Malcolm Hay was born in London to James Gordon Hay and Mary Catherine Cox, and was the grandson of Lieutenant-General James Hay (1786–1862) and Elizabeth Forbes. He had an elder brother, Gilbert, who died in infancy, and a younger brother, Cuthbert. At the age of two, James Gordon Hay died, and Malcolm inherited the estate. He was educated first at St Basil's grammar school at Frognall Hill, and then at St John's, a Jesuit preparatory school near Windsor. Hay's mother died in 1892, and he was subsequently raised by his aunt Georgina Hay, a former abbess at Sedan, France, Sedan before the Franco-Prussian war, in France against the wishes of his father's will. As a young man, Hay did no ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oliver Strachey
Oliver Strachey CBE (3 November 1874 – 14 May 1960), a British civil servant in the Foreign Office, was a cryptographer from World War I to World War II. Life and work Strachey was a son of Sir Richard Strachey, colonial administrator and Jane Maria Strachey, writer and suffragist, and a brother of the writer Lytton Strachey, the writer Dorothy Bussy and the psychoanalyst and editor of the ''Standard Edition'' James Strachey. He was educated at Eton College; he attended Balliol College, Oxford for one term (Hilary term, Hilary 1893). His parents sent him on a tour around the world with Robert Bridges. Then he studied the piano in Vienna under Theodor Leschetizky. While there he attended the funeral of Johannes Brahms in 1897.Michael Holroyd, ''Lytton Strachey'', p. 107 His playing was of a certain standard, but not up to concert performance, so he returned to England and joined the Foreign Office Foreign may refer to: Government * Foreign policy, how a country interacts ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John Tiltman
Brigadier John Hessell Tiltman, (25 May 1894 – 10 August 1982) was a British Army officer who worked in intelligence, often at or with the Government Code and Cypher School (GC&CS) starting in the 1920s. His intelligence work was largely connected with cryptography, and he showed exceptional skill at cryptanalysis. His work in association with Bill Tutte on the cryptanalysis of the Lorenz cipher, the German teleprinter cipher, called " Tunny" (for tunafish) at Bletchley Park, led to breakthroughs in attack methods on the code, without a computer. It was to exploit those methods, at extremely high speed with great reliability, that Colossus, the first digital programmable electronic computer, was designed and built. Biography Tiltman's parents were from Scotland, though he was born in London. He joined the British Army in August 1914, initially with the London Scottish Regiment, and saw service at the front during World War I with the 6th Battalion King's Own Scottish Bord ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cryptography Organizations
Cryptography, or cryptology (from "hidden, secret"; and ''graphein'', "to write", or ''-logia'', "study", respectively), is the practice and study of techniques for secure communication in the presence of adversarial behavior. More generally, cryptography is about constructing and analyzing protocols that prevent third parties or the public from reading private messages. Modern cryptography exists at the intersection of the disciplines of mathematics, computer science, information security, electrical engineering, digital signal processing, physics, and others. Core concepts related to information security ( data confidentiality, data integrity, authentication, and non-repudiation) are also central to cryptography. Practical applications of cryptography include electronic commerce, chip-based payment cards, digital currencies, computer passwords, and military communications. Cryptography prior to the modern age was effectively synonymous with encryption, converting re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
