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gptkbp:instanceOf
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crypt
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gptkbp:alsoKnownAs
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gptkb:Type_B_Cipher_Machine
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gptkbp:brokenBy
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gptkb:Genevieve_Grotjan_Feinstein
gptkb:Frank_Rowlett
gptkb:United_States_Army_Signal_Intelligence_Service
gptkb:William_Friedman
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gptkbp:component
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plugboard
telephone-type stepping switches
switching relays
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gptkbp:decipheredBy
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cryptanalysts at Arlington Hall
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gptkbp:firstBroken
|
1940
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https://www.w3.org/2000/01/rdf-schema#label
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The Purple Cipher
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gptkbp:influencedBy
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gptkb:Enigma_machine
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gptkbp:locationOfBreaking
|
gptkb:Arlington_Hall,_Virginia
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gptkbp:message
|
gptkb:Hull_Note_transmission
Japanese declaration of war transmission
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gptkbp:notableFor
|
contributed to Allied intelligence before Pearl Harbor
breaking led to interception of Japanese diplomatic messages
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gptkbp:operatedBy
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Japanese consulates
Japanese embassies
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gptkbp:relatedTo
|
gptkb:MAGIC_(Allied_codebreaking_project)
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gptkbp:replacedBy
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gptkb:Red_Cipher
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gptkbp:successor
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gptkb:CORAL_cipher
gptkb:JADE_cipher
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gptkbp:supportsAlgorithm
|
polyalphabetic substitution
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gptkbp:technology
|
electromechanical cipher machine
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gptkbp:usedBy
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gptkb:Imperial_Japanese_Navy
gptkb:Imperial_Japanese_Foreign_Office
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gptkbp:usedDuring
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gptkb:World_War_II
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gptkbp:bfsParent
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gptkb:Ora_Carew
gptkb:Arthur_Millett
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gptkbp:bfsLayer
|
7
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