The Abhorchdienst (i.e. "Listening Bureau") was a German code-breaking bureau which operated during the final years of the First World War. It was established in 1916 and was composed mainly of mathematicians. [1] Other countries, such as France and Austria-Hungary, had set up similar organisations at an earlier stage. Still, the military context did not necessitate the development of the German bureau until 1916. [2]
The Enigma machine is a cipher device developed and used in the early- to mid-20th century to protect commercial, diplomatic, and military communication. It was employed extensively by Nazi Germany during World War II, in all branches of the German military. The Enigma machine was considered so secure that it was used to encipher the most top-secret messages.
Burglary, also called breaking and entering (B&E) and sometimes housebreaking, is the act of illegally entering a building or other areas without permission, typically with the intention of committing a criminal offence. Usually that offence is theft, larceny, robbery, or murder, but most jurisdictions include others within the ambit of burglary. To commit burglary is to burgle, a term back-formed from the word burglar, or to burglarize.
Herbert Osborn Yardley was an American cryptologist. He founded and led the cryptographic organization the Black Chamber. Under Yardley, the cryptanalysts of The American Black Chamber broke Japanese diplomatic codes and were able to furnish American negotiators with significant information during the Washington Naval Conference of 1921–1922. Recipient of the Distinguished Service Medal. He wrote The American Black Chamber (1931) about his experiences there. He later helped the Nationalists in China (1938–1940) to break Japanese codes. Following his work in China, Yardley worked briefly for the Canadian government, helping it set up a cryptological section of the National Research Council of Canada from June to December 1941. Yardley was reportedly let go due to pressure either from the Secretary of War Henry L. Stimson or from the British.
The known-plaintext attack (KPA) is an attack model for cryptanalysis where the attacker has access to both the plaintext and its encrypted version (ciphertext). These can be used to reveal further secret information such as secret keys and code books. The term "crib" originated at Bletchley Park, the British World War II decryption operation, where it was defined as:
A plain language passage of any length, usually obtained by solving one or more cipher or code messages, and occurring or believed likely to occur in a different cipher or code message, which it may provide a means of solving.
Cryptography, the use of codes and ciphers to protect secrets, began thousands of years ago. Until recent decades, it has been the story of what might be called classical cryptography — that is, of methods of encryption that use pen and paper, or perhaps simple mechanical aids. In the early 20th century, the invention of complex mechanical and electromechanical machines, such as the Enigma rotor machine, provided more sophisticated and efficient means of encryption; and the subsequent introduction of electronics and computing has allowed elaborate schemes of still greater complexity, most of which are entirely unsuited to pen and paper.
The Cipher Bureau was the interwar Polish General Staff's Second Department's unit charged with SIGINT and both cryptography and cryptanalysis.
Room 40, also known as 40 O.B., was the cryptanalysis section of the British Admiralty during the First World War.
The Idflieg was the bureau of the German Empire that oversaw German military aviation prior to and during World War I.
Cryptography was used extensively during World War II because of the importance of radio communication and the ease of radio interception. The nations involved fielded a plethora of code and cipher systems, many of the latter using rotor machines. As a result, the theoretical and practical aspects of cryptanalysis, or codebreaking, were much advanced.
Alfred Dillwyn "Dilly" Knox, CMG was a British classics scholar and papyrologist at King's College, Cambridge and a codebreaker. As a member of the Room 40 codebreaking unit he helped decrypt the Zimmermann Telegram which brought the USA into the First World War. He then joined the Government Code and Cypher School (GC&CS).
The V and W class was an amalgam of six similar classes of destroyer built for the Royal Navy under the 9th, 10th, 13th and 14th of fourteen War Emergency Programmes during the First World War and generally treated as one class. For their time they were among the most powerful and advanced ships of their type in the world, and set the trend for future British designs.
The Swiss Civil Code is a portion of the second part of the internal Swiss law that regulates the codified law ruling in Switzerland and relationship between individuals. It was first adopted in 1907.
Marian Adam Rejewski was a Polish mathematician and cryptologist who in late 1932 reconstructed the sight-unseen Nazi German military Enigma cipher machine, aided by limited documents obtained by French military intelligence. Over the next nearly seven years, Rejewski and fellow mathematician-cryptologists Jerzy Różycki and Henryk Zygalski developed and used techniques and equipment to decrypt the German machine ciphers, even as the Germans introduced modifications to their equipment and encryption procedures. Five weeks before the outbreak of World War II in Europe, the Poles shared their technological achievements with the French and British at a conference in Warsaw, thus enabling Britain to begin reading German Enigma-encrypted messages, seven years after Rejewski's original reconstruction of the machine. The intelligence that was gained by the British from Enigma decrypts formed part of what was code-named Ultra and contributed—perhaps decisively—to the defeat of Nazi Germany.
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.
Lesbian, gay, bisexual, and transgender (LGBT) persons in Togo face legal challenges not experienced by non-LGBT residents. Both male and female same-sex sexual activity is illegal in Togo.
Corinne is a census-designated place (CDP) in Wyoming County, West Virginia, United States.
Chinook is a hamlet in southern Alberta, Canada within Special Area No. 3. It is located on Highway 9 approximately 119 kilometres (74 mi) northeast of Brooks.
Omar is an unincorporated community and census-designated place (CDP) in Logan County, West Virginia, United States. Omar is located along West Virginia Route 44 and Island Creek, 6.5 miles (10.5 km) south of Logan. Omar has a post office with ZIP code 25638. As of the 2010 census, its population was 552.
Ferdinand Voegele was a German philologist and linguistic cryptanalyst, before and during the time of World War II and who would eventually lead the cipher bureau of the Luftwaffe Signal Intelligence Service.