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- Ultra abstract "Ultra was the designation adopted by British military intelligence in June 1941 for wartime signals intelligence obtained by breaking high-level encrypted enemy radio and teleprinter communications at the Government Code and Cypher School (GC&CS) at Bletchley Park. Ultra eventually became the standard designation among the western Allies for all such intelligence. The name arose because the intelligence thus obtained was considered more important than that designated by the highest British security classification then used (Most Secret) and so was regarded as being Ultra secret. Several other cryptonyms had been used for such intelligence. British intelligence first designated it Boniface — presumably to imply that it was the result of human intelligence. The U.S. used the codename Magic for its decrypts from Japanese sources.Much of the German cipher traffic was encrypted on the Enigma machine. Used properly, the German military Enigma would have been virtually unbreakable; in practice, shortcomings in operation allowed it to be broken. The term "Ultra" has often been used almost synonymously with "Enigma decrypts". However, Ultra also encompassed decrypts of the German Lorenz SZ 40/42 machines that were used by the German High Command, and the Hagelin machine and other Italian and Japanese ciphers and codes such as PURPLE and JN-25.Many observers, at the time and later, regarded Ultra as immensely valuable to the Allies.Winston Churchill told King George VI: "It was thanks to Ultra that we won the war." F. W. Winterbotham quoted the western Supreme Allied Commander, Dwight D. Eisenhower, at war's end describing Ultra as having been "decisive" to Allied victory. Sir Harry Hinsley, official historian of British Intelligence in World War II, made a similar assessment about Ultra, saying that it shortened the war "by not less than two years and probably by four years"; and that, in the absence of Ultra, it is uncertain how the war would have ended.".
- Ultra thumbnail EnigmaMachine_Warzawa.jpg?width=300.
- Ultra wikiPageExternalLink HoC_08e.PDF.
- Ultra wikiPageExternalLink nsarep.pdf.
- Ultra wikiPageExternalLink ultra.html.
- Ultra wikiPageExternalLink www.upso.co.uk.
- Ultra wikiPageExternalLink v09i4a07p_0001.htm.
- Ultra wikiPageID "31748".
- Ultra wikiPageRevisionID "605067331".
- Ultra caption "Enigma machine out of its wooden box".
- Ultra caption "Lorenz SZ42 machine with covers removed".
- Ultra caption "Part of Japanese PURPLE machine".
- Ultra footer "Three cipher machines that were broken by the Allies to yield Ultra intelligence".
- Ultra hasPhotoCollection Ultra.
- Ultra image "EnigmaMachine Warzawa.jpg".
- Ultra image "Lorenz-SZ42-2.jpg".
- Ultra image "Purple code machine 2.jpg".
- Ultra width "180".
- Ultra subject Category:Military_intelligence.
- Ultra subject Category:Signals_intelligence_of_World_War_II.
- Ultra type Agent.
- Ultra type Company.
- Ultra type Organisation.
- Ultra type Organization.
- Ultra type Agent.
- Ultra type SocialPerson.
- Ultra type Thing.
- Ultra comment "Ultra was the designation adopted by British military intelligence in June 1941 for wartime signals intelligence obtained by breaking high-level encrypted enemy radio and teleprinter communications at the Government Code and Cypher School (GC&CS) at Bletchley Park. Ultra eventually became the standard designation among the western Allies for all such intelligence.".
- Ultra label "Ultra (Kryptologie)".
- Ultra label "Ultra (crittografia)".
- Ultra label "Ultra (decryptie)".
- Ultra label "Ultra (nom de code)".
- Ultra label "Ultra (криптоанализ)".
- Ultra label "Ultra".
- Ultra label "Ultra".
- Ultra label "ألترا (تعمية)".
- Ultra sameAs Ultra_(Kryptologie).
- Ultra sameAs Επιχείρηση_Ultra.
- Ultra sameAs Ultra_(nom_de_code).
- Ultra sameAs Ultra_(crittografia).
- Ultra sameAs Ultra_(decryptie).
- Ultra sameAs Ultra.
- Ultra sameAs m.07t1p.
- Ultra sameAs Q825712.
- Ultra sameAs Q825712.
- Ultra wasDerivedFrom Ultra?oldid=605067331.
- Ultra depiction EnigmaMachine_Warzawa.jpg.
- Ultra isPrimaryTopicOf Ultra.
