01507nam 2200397I 450 991070374500332120151105093254.0(CKB)5470000002434272(OCoLC)927616946(EXLCZ)99547000000243427220151105d2015 uy 0engtxtrdacontentcrdamediacrrdacarrierThe SIGABA /ECM II Cipher Machine "a beautiful idea" /Timothy J. MucklowFort George G. Meade, MD :National Security Agency, Center for Cryptologic History,2015.1 online resource ( 44 pages) illustrations"This publication is distributed free by the National Security Agency."Title from title screen (viewed June 25, 2015).Includes bibliographical references (pages 38-44).SIGABA /ECM II Cipher Machine SIGABA cipher systemHistoryWorld War, 1939-1945CryptographyCryptographyHistory20th centurySIGABA cipher systemHistory.World War, 1939-1945Cryptography.CryptographyHistoryMucklow Timothy J(Timothy Jones),1394405United States.National Security Agency/Central Security Service.Center for Cryptologic History,GPOGPOBOOK9910703745003321The SIGABA3451711UNINA