EntityQ2185271· pop 10· linked from 50 articlesZygalski sheetsSign in to saveCryptologic technique used in World War IIConnectionscryptographyEntityBletchley ParkEntityCipher BureauEntityJohn HerivelEntityFranceCountryPolandCountryLondonCityEnglandEntityWorld War IIConceptWarsawEntityAlan TuringEntityGreat BritainEntityInternational Standard Book NumberEntitymathematicianEntityWayback MachineEntitydigital object identifierEntityencryptionEntityEnigmaEntitypunched cardEntityrazorEntityCategoriesCipher Bureau (Poland)Cryptographic attacksPerforation-based computational toolsPolish inventionsScience and technology in Poland