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Double-Cross System
The Double-Cross System or XX System was a World War II counter-espionage and deception operation of the British Security Service (a civilian organisation usually referred to by its cover title MI5). Nazi agents in Britain – real and false – were captured, turned themselves in or simply announced themselves, and were then used by the British to broadcast mainly disinformation to their Nazi controllers. Its operations were overseen by the Twenty Committee under the chairmanship of John Cecil Masterman; the name of the committee comes from the number 20 in Roman numerals: "XX" (i.e. a double cross). The policy of MI5 during the war was initially to use the system for counter-espionage Counterintelligence is an activity aimed at protecting an agency's intelligence program from an opposition's intelligence service. It includes gathering information and conducting activities to prevent espionage, sabotage, assassinations or ot .... It was only later that its potential for dece ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
World War II
World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposing military alliances: the Allies and the Axis powers. World War II was a total war that directly involved more than 100 million personnel from more than 30 countries. The major participants in the war threw their entire economic, industrial, and scientific capabilities behind the war effort, blurring the distinction between civilian and military resources. Aircraft played a major role in the conflict, enabling the strategic bombing of population centres and deploying the only two nuclear weapons ever used in war. World War II was by far the deadliest conflict in human history; it resulted in 70 to 85 million fatalities, mostly among civilians. Tens of millions died due to genocides (including the Holocaust), starvation, ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arthur Owens
Arthur Graham Owens, later known as Arthur Graham White (14 April 1899 – 24 December 1976), was a Welsh double agent for the Allies during the Second World War. He was working for MI5 while appearing to the Abwehr (the German intelligence agency) to be one of their agents. Owens was known to MI5 by the codename SNOW, which was chosen as a play on his last name. Recruitment by the British and the Germans Owens ran a company that made batteries for ships. As such, he was a civilian contractor for the Royal Navy and also had regular contact with the Kriegsmarine in Kiel. His first experience of espionage occurred in 1936 when he had been briefly employed by the Secret Intelligence Service to provide information on what he had seen in the German shipyards. In 1938, Nikolaus Ritter, an Abwehr agent in Britain under the name "Dr Rantzau", made contact with him. As a Welsh nationalist, Owens had little loyalty to the United Kingdom. His work also provided a cover for any foreign trips ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Code (cryptography)
In cryptology, a code is a method used to encrypt a message that operates at the level of meaning; that is, words or phrases are converted into something else. A code might transform "change" into "CVGDK" or "cocktail lounge". The U.S. National Security Agency defined a code as "A substitution cryptosystem in which the plaintext elements are primarily words, phrases, or sentences, and the code equivalents (called "code groups") typically consist of letters or digits (or both) in otherwise meaningless combinations of identical length."A History of U.S. Communications Security; the David G. Boak Lectures National Security Agency (NSA), Volumes I, 1973, Volumes II 1981, partially released 2008, additional portions declassified October 14, 2015 A '' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radio
Radio is the technology of signaling and communicating using radio waves. Radio waves are electromagnetic waves of frequency between 30 hertz (Hz) and 300 gigahertz (GHz). They are generated by an electronic device called a transmitter connected to an antenna which radiates the waves, and received by another antenna connected to a radio receiver. Radio is very widely used in modern technology, in radio communication, radar, radio navigation, remote control, remote sensing, and other applications. In radio communication, used in radio and television broadcasting, cell phones, two-way radios, wireless networking, and satellite communication, among numerous other uses, radio waves are used to carry information across space from a transmitter to a receiver, by modulating the radio signal (impressing an information signal on the radio wave by varying some aspect of the wave) in the transmitter. In radar, used to locate and track objects like aircraft, ships, spacecraf ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Secret Writing
Steganography ( ) is the practice of representing information within another message or physical object, in such a manner that the presence of the information is not evident to human inspection. In computing/electronic contexts, a computer file, message, image, or video is concealed within another file, message, image, or video. The word ''steganography'' comes from Greek ''steganographia'', which combines the words ''steganós'' (), meaning "covered or concealed", and ''-graphia'' () meaning "writing". The first recorded use of the term was in 1499 by Johannes Trithemius in his ''Steganographia'', a treatise on cryptography and steganography, disguised as a book on magic. Generally, the hidden messages appear to be (or to be part of) something else: images, articles, shopping lists, or some other cover text. For example, the hidden message may be in invisible ink between the visible lines of a private letter. Some implementations of steganography that lack a shared secret are for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Motorcycle
A motorcycle (motorbike, bike, or trike (if three-wheeled)) is a two or three-wheeled motor vehicle steered by a handlebar. Motorcycle design varies greatly to suit a range of different purposes: long-distance travel, commuting, cruising, sport (including racing), and off-road riding. Motorcycling is riding a motorcycle and being involved in other related social activity such as joining a motorcycle club and attending motorcycle rallies. The 1885 Daimler Reitwagen made by Gottlieb Daimler and Wilhelm Maybach in Germany was the first internal combustion, petroleum-fueled motorcycle. In 1894, Hildebrand & Wolfmüller became the first series production motorcycle. Globally, motorcycles are comparably popular to cars as a method of transport. In 2021, approximately 58.6 million new motorcycles were sold around the world, fewer than the 66.7 million cars sold over the same period. In 2014, the three top motorcycle producers globally by volume were Honda (28%), Yamaha (17 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Canoe
A canoe is a lightweight narrow water vessel, typically pointed at both ends and open on top, propelled by one or more seated or kneeling paddlers facing the direction of travel and using a single-bladed paddle. In British English, the term ''canoe'' can also refer to a kayak, while canoes are called Canadian or open canoes to distinguish them from kayaks. Canoes were developed by cultures all over the world, including some designed for use with sails or outriggers. Until the mid-19th century, the canoe was an important means of transport for exploration and trade, and in some places is still used as such, sometimes with the addition of an outboard motor. Where the canoe played a key role in history, such as the Northern United States, Canada, and New Zealand, it remains an important theme in popular culture. Canoes are now widely used for competition and pleasure, such as racing, whitewater, touring and camping, freestyle and general recreation. Canoeing has been part ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wulf Schmidt
Wulf Dietrich Christian Schmidt, later known as Harry Williamson (7 December 1911 – 19 October 1992) was a Danish citizen who became a double agent working for Britain against Nazi Germany during the Second World War under the codename Tate. He was part of the Double Cross System, under which all German agents in Britain were controlled by MI5 and used to deceive Germany. Nigel West singled him out as "one of the seven spies who changed the world." Career as a double agent Schmidt was sent to Britain by the Abwehr in September 1940, landing by parachute. He was arrested immediately, as a captured agent had divulged the time of his arrival in return for a promise that Schmidt, a friend, would not be executed. Schmidt broke down under interrogation and became a double agent, making contact with Germany by radio in October 1940. He was one of the longest running agents in the Double Cross System; his last contact with Germany was on 2 May 1945. He operated his radio himself unti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gösta Caroli
Gösta Caroli (6 November 1902 – 8 May 1975) was a double agent working for MI5 during the Second World War under the codename SUMMER. Gösta Caroli and Wulf Schmidt Wulf Dietrich Christian Schmidt, later known as Harry Williamson (7 December 1911 – 19 October 1992) was a Danish citizen who became a double agent working for Britain against Nazi Germany during the Second World War under the codename Tate. H ... (a Danish citizen) landed, via parachute, in September 1940. The two were genuine Nazis, had trained together and were friends. Caroli was coerced into turning double in return for Schmidt's life being spared, whilst Schmidt was told that Caroli had sold him out and in anger swapped sides. Caroli quickly became a problem; he attempted to strangle his MI5 handler before making an escape carrying a canoe, on a motorcycle. He vaguely planned to row to the Netherlands, but came unstuck after falling off the bike in front of a policeman. He was eventually recaptured and j ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Guy Liddell
Guy Maynard Liddell, CB, CBE, MC (8 November 1892 – 3 December 1958) was a British intelligence officer. Biography Early life and career Liddell was born on 8 November 1892 at 64 Victoria Street, London, the son of Capt. Augustus Frederick Liddell RA, a retired Royal Artillery officer, and his wife Emily Shinner, who died when Liddell was eight years old. He was the younger brother of Capt. Cecil Frederick Joseph Liddell, who served as Head of MI5's Irish section from 1939, and David Edward Liddell; and was a second cousin of Alice Pleasance Liddell, the child friend of Lewis Carroll who was the basis for the books ''Alice's Adventures in Wonderland'' and ''Through The Looking Glass''. He was a talented cellist in his youth, and was studying in Germany for a career as a professional musician when the First World War began. He joined the Honourable Artillery Company as a private, a unit his brothers David Liddell MC and Cecil served with. During the conflict, he was commissi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Military Deception
Military deception (MILDEC) is an attempt by a military unit to gain an advantage during warfare by misleading adversary decision makers into taking action or inaction that creates favorable conditions for the deceiving force. This is usually achieved by creating or amplifying an artificial fog of war via psychological operations, information warfare, visual deception, or other methods. As a form of disinformation, it overlaps with psychological warfare. Military deception is also closely connected to operations security (OPSEC) in that OPSEC attempts to conceal from the adversary critical information about an organization's capabilities, activities, limitations, and intentions, or provide a plausible alternate explanation for the details the adversary can observe, while deception reveals false information in an effort to mislead the adversary. Deception in warfare dates back to early history. ''The Art of War'', an ancient Chinese military treatise, emphasizes the importance of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bona Fides
In human interactions, good faith ( la, bona fides) is a sincere intention to be fair, open, and honest, regardless of the outcome of the interaction. Some Latin phrases have lost their literal meaning over centuries, but that is not the case with ''bona fides'', which is still widely used and interchangeable with its generally-accepted modern-day English translation of ''good faith''. It is an important concept within law and business. The opposed concepts are bad faith, ''mala fides'' (duplicity) and perfidy (pretense). In contemporary English, the usage of ''bona fides'' is synonymous with credentials and identity. The phrase is sometimes used in job advertisements, and should not be confused with the ''bona fide'' occupational qualifications or the employer's good faith effort, as described below. ''Bona fides'' ''Bona fides'' is a Latin phrase meaning "good faith". Its ablative case is ''bona fide'', meaning "in good faith", which is often used as an adjective to mean ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
