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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:Frank_Rowlett
gptkb:Agnes_Driscoll
gptkb:Genevieve_Grotjan
gptkb:William_Friedman
United States cryptanalysts
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gptkbp:category
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cryptography
military communications
World War II technology
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gptkbp:component
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plugboard
lampboard
typewriter keyboard
telephone-type stepping switches
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gptkbp:countryOfOrigin
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gptkb:Japan
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gptkbp:decipheredBy
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gptkb:U.S._Army_Signal_Intelligence_Service
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gptkbp:developedBy
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1937
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gptkbp:displayedAt
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gptkb:National_Museum_of_the_United_States_Air_Force
gptkb:National_Cryptologic_Museum
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https://www.w3.org/2000/01/rdf-schema#label
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Purple cipher machine
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gptkbp:influencedBy
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gptkb:Enigma_machine
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gptkbp:notableEvent
|
used in communications before Pearl Harbor attack
decryption led to intelligence advantage for Allies
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gptkbp:replacedBy
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gptkb:Red_cipher_machine
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gptkbp:successor
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gptkb:CORAL_cipher_machine
gptkb:JADE_cipher_machine
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gptkbp:supportsAlgorithm
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polyalphabetic cipher
substitution cipher
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gptkbp:technology
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electromechanical
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gptkbp:usedBy
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gptkb:Imperial_Japanese_Navy
gptkb:Japanese_Foreign_Office
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gptkbp:usedDuring
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gptkb:World_War_II
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gptkbp:usedFor
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diplomatic communications
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gptkbp:bfsParent
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gptkb:NSA_Crypto_Museum
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gptkbp:bfsLayer
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5
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