ULTRA
E1019840
ULTRA was the codename for the highly classified World War II Allied intelligence program that decrypted encrypted Axis communications, most notably those encoded by the German Enigma machine.
Statements (67)
| Predicate | Object |
|---|---|
| instanceOf |
Allied intelligence program
ⓘ
codebreaking effort ⓘ signals intelligence operation ⓘ |
| contributedTo | shortening World War II ⓘ |
| countryOfPrimaryResponsibility | United Kingdom GENERATED ⓘ |
| estimatedImpact | shortened the war in Europe by about two years (commonly cited estimate) ⓘ |
| hadCodewordUsage | used as a compartmented security codeword for high-grade intelligence ⓘ |
| hadKeyFigure |
Alan Turing
NERFINISHED
ⓘ
Dilly Knox NERFINISHED ⓘ Edward Travis NERFINISHED ⓘ Gordon Welchman NERFINISHED ⓘ Henryk Zygalski NERFINISHED ⓘ Hugh Alexander NERFINISHED ⓘ Jerzy Różycki NERFINISHED ⓘ Marian Rejewski NERFINISHED ⓘ Stewart Menzies NERFINISHED ⓘ |
| hasCodenameType | wartime codename GENERATED ⓘ |
| influenced |
Allied strategic decision-making
ⓘ
tactical operations ⓘ |
| intelligenceProductLabel | ULTRA intelligence ⓘ |
| mainDecryptionSite | Bletchley Park NERFINISHED ⓘ |
| notablyDecrypted |
Enigma-encoded messages
GENERATED
ⓘ
German Enigma traffic GENERATED ⓘ Kriegsmarine communications GENERATED ⓘ Luftwaffe communications GENERATED ⓘ Wehrmacht communications GENERATED ⓘ |
| operatedDuring | World War II NERFINISHED ⓘ |
| relatedTo |
Enigma machine
NERFINISHED
ⓘ
Magic (US codebreaking program against Japanese codes) NERFINISHED ⓘ SIGINT NERFINISHED ⓘ cryptanalysis of the Enigma ⓘ |
| requiredCoverHandling |
Special Liaison Officers
NERFINISHED
ⓘ
Special Liaison Units NERFINISHED ⓘ |
| securityClassification | Top Secret ⓘ |
| supportedOperation |
Battle of El Alamein
NERFINISHED
ⓘ
Battle of the Atlantic NERFINISHED ⓘ D-Day NERFINISHED ⓘ Italian campaign NERFINISHED ⓘ Normandy landings NERFINISHED ⓘ North African campaign NERFINISHED ⓘ strategic bombing campaign over Germany ⓘ |
| targeted |
Axis communications
NERFINISHED
ⓘ
German military communications ⓘ Italian military communications ⓘ Japanese military communications ⓘ |
| usedMethod |
cryptanalysis
ⓘ
pattern recognition ⓘ statistical analysis ⓘ traffic analysis ⓘ |
| usedTechnology |
Bombe electromechanical decryption machines
NERFINISHED
ⓘ
Colossus computers NERFINISHED ⓘ |
| wasConductedBy |
Allies
NERFINISHED
ⓘ
Australia NERFINISHED ⓘ Canada NERFINISHED ⓘ Free French forces NERFINISHED ⓘ New Zealand NERFINISHED ⓘ Poland NERFINISHED ⓘ United Kingdom NERFINISHED ⓘ United States NERFINISHED ⓘ |
| wasConsidered | one of the most closely guarded secrets of World War II ⓘ |
| wasCoordinatedAt | Bletchley Park NERFINISHED ⓘ |
| wasDeclassifiedBy | United Kingdom government NERFINISHED ⓘ |
| wasFollowedBy | postwar signals intelligence programs ⓘ |
| wasManagedBy |
GC&CS
NERFINISHED
ⓘ
Government Code and Cypher School NERFINISHED ⓘ |
| wasPrecededBy | Polish Cipher Bureau Enigma work ⓘ |
| wasRevealedToPublic | 1970s ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.