Information om | Engelska ordet ENCIPHERED

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• "Floradora", also called Keyword, was a doubly enciphered diplomatic code used by the Germans during the Second World War.
• He apparently became interested in cryptography through solving cryptograms in newspapers' personal columns, and soon applied his cryptanalytic skills in a military context when, in 1890, he solved messages enciphered with the official French military transposition system, causing the War Ministry to change to a new scheme.
• The method of Zygalski sheets was a cryptologic technique used by the Polish Cipher Bureau before and during World War II, and during the war also by British cryptologists at Bletchley Park, to decrypt messages enciphered on German Enigma machines.
• In the first few months after arriving at Bletchley Park in September 1939, Alan Turing correctly deduced that the message-settings of Kriegsmarine Enigma signals were enciphered on a common Grundstellung (starting position of the rotors), and were then super-enciphered with a bigram and a trigram lookup table.
• Known-plaintext attack (KPA) - in this type of attack it is assumed that the cryptanalyst has access to at least a limited number of pairs of plaintext and the corresponding enciphered text.
• The weakness in this was that the medium might have been shown the message before the seance, so he enciphered it using keywords he refused to divulge.
• The Enigma machine worked reciprocally so that an identical machine with identical settings would, if fed the enciphered letters, show the deciphered letters on the lampboard.
• Because each symbol in both plaintext and key is used as a whole number without any fractionation, the basic Nihilist cipher is little more than a numerical version of the Vigenère cipher, with multiple-digit numbers being the enciphered symbols instead of letters.
• Part III will deal with varieties of aperiodic substitution systems, elementary cipher devices and cryptomechanisms, and will embrace a detailed treatment of cryptomathematics and diagnostic tests in cryptanalysis; Part IV will treat transposition and fractioning systems, and combined substitution-transposition systems; Part V will treat the reconstruction of codes, and the solution of enciphered code systems, and Part VI will treat the solution of representative machine cipher systems.
• He had been a codebreaker in Room 40 during World War I and was one of the GC&CS staff that met the Polish codebreakers in July 1939 and who supplied so much useful information about the Enigma machine and how they had developed methods of reading much of its enciphered messages.
• Bletchley Park decrypts of messages enciphered with the Enigma machines revealed that the Germans called one of their wireless teleprinter transmission systems "Sägefisch" (sawfish), which led British cryptographers to refer to encrypted German radiotelegraphic traffic as "Fish".
• The first system that was subordinated to Chi I, intercepted inter-state wireless traffic of enemy and neutral stations, that included enciphered and unenciphered telegraphic communications of diplomatic and military attache messages sent in Morse code and most messages were encrypted and received from enemy and neutral states.
• On 9 January 1932 Radioman Kunert, located at the Baltic naval base in Kiel, made a fundamental mistake when he transmitted both the enciphered and plain message to anybody who was listening.
• The Irish used the British Government Telegraph Code (abbr GTC) which was called B-22 by Pers S Z, which was enciphered by the use of substitution alphabets.
• By 1939: three 4-figure conversion systems with codebooks of up to 5000 values, enciphered by digraphic substitution or conversion table.

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