EntityQ1197850· pop 17· linked from 163 articlesPurpleSign in to saveJapanese diplomatic code named Purple by the USConnectionsJADEEntityencryptionEntitycryptanalysisEntitySignal Intelligence ServiceEntitystepping switchEntityRedEntitySecure channelEntityWorld War IIConceptSoviet UnionConceptNazi GermanyConceptInternational Standard Book NumberEntitycryptocurrencyEntityWayback MachineEntitycryptographyEntitydigital object identifierEntityGeorge MarshallEntityOperation BarbarossaEntityAttack on Pearl HarborConceptJoachim von RibbentropEntitykanaEntityCategoriesAttack on Pearl HarborEncryption devicesJapan–United States relationsWorld War II Japanese cryptography