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Cipher Department of the High Command of the Wehrmacht
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Cipher Department of the High Command of the Wehrmacht : ウィキペディア英語版
Cipher Department of the High Command of the Wehrmacht
The Cipher Department of the High Command of the Wehrmacht (German: Amtsgruppe Wehrmachtnachrichtenverbindungen, Abtei-lung Chiffrierwesen) (also Oberkommando der Wehrmacht Chiffrierabteilung or Chiffrierabteilung of the High Command of the Wehrmacht or Chiffrierabteilung of the OKW or Chi) was the Signal Intelligence Agency of the Supreme Command of the Armed Forces of the German Armed Forces before and during World War II. OKW/Chi dealt with the cryptanalysis and de-ciphering of enemy and neutral states message traffic and security control of its own key processes and machinery, such as the rotor cipher machine ENIGMA machine. It was the successor to the former Chi-point(Chiffrierstelle) of the Reichswehr Ministry.〔Friedrich L. Bauer: Decrypted Secrets. Methods and Maxims of cryptography. 3 revised and expanded edition. 2000, p 412〕
==Short name==
The letter "Chi" for the Chiffrierabteilung is, contrary to what one might expect, not the Greek letter Chi, nor anything to do with the chi test, a common cryptographic test used as part of deciphering of enciphered message, and invented by Solomon Kullback, but only to the first three letters of the word Chiffrierabteilung (English:cipher department).

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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