EntityQ1343482· pop 14· linked from 388 articlesLuciferSign in to saveearliest civilian block ciphersConnectionsIBMEntityencryptionEntitykeyEntityFeistel cipherEntitySecure channelEntitybankEntityInternational Standard Book NumberEntityhard diskEntitycryptocurrencyEntitycryptographyEntitydigital object identifierEntityautomated teller machineEntityFortranEntityfloppy diskEntityNational Security AgencyEntityransomwareEntityRed HatEntityDeep BlueEntityhash functionEntitypublic-key cryptographyEntityCategoriesBlock ciphersBroken block ciphersData Encryption StandardFeistel ciphers