United States Government Publishing Office publisher pbl distributor dst United States Defense Department author aut Government Organization Bernard, Richard L. author aut text government publication eng GOVPUB Executive Agency Publications executive 2023-08-31 Defense Department 2009-01-01 monographic harvested born digital 18 digital object pages D 1.2:EL 2/4 https://www.govinfo.gov/app/details/GOVPUB-D-PURL-gpo7719 P0b002ee1c0489134 000817552 https://purl.fdlp.gov/GPO/gpo7719 (OCoLC)726855752 DGPO 2023-08-31 2026-06-28 GOVPUB-D-PURL-gpo7719 machine generated eng fdlp D GOVPUB-D-PURL-gpo7719 PURL-gpo7719 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. 2009 PERM_INGEST_04282022 gpo7719 https://www.govinfo.gov/app/details/GOVPUB-D-PURL-gpo7719 https://www.govinfo.gov/content/pkg/GOVPUB-D-PURL-gpo7719/pdf/GOVPUB-D-PURL-gpo7719.pdf Data transmission systems Electronic surveillance Security measures United States 0306 (online) Bernard, Richard L. creator United States National Security Agency/Central Security Service. Center for Cryptologic History. mdu Center for Cryptologic History, National Security Agency 2009. monographic

electronic resource

1 online resource (14 pages) : illustrations D 1.2:EL 2/4 0306 (online) text eng Richard L. Bernard. Title from title screen (viewed on May 24, 2011). n-us--- Electronic surveillance United States Data transmission systems Security measures https://purl.fdlp.gov/GPO/gpo7719 http://www.nsa.gov/about/_files/cryptologic_heritage/publications/misc/elint.pdf https://catalog.gpo.gov/fdlpdir/locate.jsp?ItemNumber=0306&SYS=000817552