United States Government Publishing Office publisher pbl distributor dst United States Defense Department author aut Government Organization Mucklow, Timothy J. (Timothy Jones) author aut text government publication eng GOVPUB Executive Agency Publications executive 2023-08-30 Defense Department 2015-01-01 monographic harvested born digital 52 digital object pages D 1.2:C 49/5 https://www.govinfo.gov/app/details/GOVPUB-D-PURL-gpo58671 P0b002ee1c042a7b7 000950212 https://purl.fdlp.gov/GPO/gpo58671 (OCoLC)927616946 DGPO 2023-08-30 2026-06-28 GOVPUB-D-PURL-gpo58671 machine generated eng fdlp D GOVPUB-D-PURL-gpo58671 PURL-gpo58671 GOVPUB This content was harvested from online sources of the original hosting or authoring agency and may not reflect current policy. As Federal agencies add publications to their websites, or report new publications to GPO per statutory mandate (44 U.S.C. §§ 1710, 1902-1903), GPO ensures long-term preservation of and access to the content. 2015 PERM_INGEST_04282022 gpo58671 https://www.govinfo.gov/app/details/GOVPUB-D-PURL-gpo58671 https://www.govinfo.gov/content/pkg/GOVPUB-D-PURL-gpo58671/pdf/GOVPUB-D-PURL-gpo58671.pdf "A Beautiful Idea", "A Beautiful Idea" Cryptography History SIGABA cipher system World War, 1939-1945 0306 (online) Mucklow, Timothy J. (Timothy Jones) creator author. United States National Security Agency/Central Security Service. Center for Cryptologic History, issuing body. mdu National Security Agency, Center for Cryptologic History 2015. monographic 1 online resource ( 44 pages) : illustrations D 1.2:C 49/5 0306 (online) text eng Timothy J. Mucklow. "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 cipher system History World War, 1939-1945 Cryptography Cryptography History 20th century https://purl.fdlp.gov/GPO/gpo58671 https://www.nsa.gov/about/_files/cryptologic_heritage/center_crypt_history/publications/The_SIGABA_ECM_Cipher_Machine_A_Beautiful_Idea3.pdf https://catalog.gpo.gov/fdlpdir/locate.jsp?ItemNumber=0306&SYS=000950212 The "a beautiful idea" "a beautiful idea" "a beautiful idea" "a beautiful idea"