{"id":4066,"date":"2025-05-20T05:03:26","date_gmt":"2025-05-20T05:03:26","guid":{"rendered":"https:\/\/serisec.com\/index.php\/2025\/05\/20\/the-nsas-fifty-years-of-mathematical-cryptanalysis-1937-1987-html\/"},"modified":"2025-05-20T05:03:26","modified_gmt":"2025-05-20T05:03:26","slug":"the-nsas-fifty-years-of-mathematical-cryptanalysis-1937-1987-html","status":"publish","type":"post","link":"https:\/\/serisec.com\/index.php\/2025\/05\/20\/the-nsas-fifty-years-of-mathematical-cryptanalysis-1937-1987-html\/","title":{"rendered":"The NSA\u2019s \u201cFifty Years of Mathematical Cryptanalysis (1937\u20131987)\u201d"},"content":{"rendered":"\n<div>The NSA\u2019s \u201cFifty Years of Mathematical Cryptanalysis (1937\u20131987)\u201d<\/div>\n<p> \t<BR><br \/>\n<BR><\/BR><br \/>\n    <!-- no image --><br \/>\n \t<BR><br \/>\n<BR><\/BR><\/p>\n<div>\n<p>In response to a FOIA request, the NSA released \u201c<a href=\"https:\/\/www.governmentattic.org\/58docs\/NSA50YrsMathCrypt1988.pdf\">Fifty Years of Mathematical Cryptanalysis (1937-1987)<\/a>,\u201d by Glenn F. Stahly, with a lot of redactions.<\/p>\n<p>Weirdly, this is the second time the NSA has declassified the document. John Young got a <a href=\"https:\/\/archive.org\/details\/NSAFiftyYearsOfMathematicalCryptanalyisis\">copy<\/a> in 2019. This one has a few less redactions. And nothing that was provided in 2019 was redacted here.<\/p>\n<p>If you find anything interesting in the document, please tell us about it in the comments.<\/p>\n<\/div>\n<p> \t<BR><br \/>\n <BR><\/BR><br \/>\n    Bruce Schneier<br \/>\n \t<BR><br \/>\n<BR><\/BR><br \/>\n<a href=\"https:\/\/www.schneier.com\/blog\/archives\/2025\/05\/the-nsas-fifty-years-of-mathematical-cryptanalysis-1937-1987.html\">Go to bruce schneier<\/a><br \/>\n \t<BR><br \/>\n <BR><\/BR><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The NSA\u2019s \u201cFifty Years of Mathematical Cryptanalysis (1937\u20131987)\u201d In response to a FOIA request, the NSA released \u201cFifty Years of Mathematical Cryptanalysis (1937-1987),\u201d by Glenn F. Stahly, with a lot of redactions. Weirdly, this is the second time the NSA has declassified the document. John Young got a copy in 2019. This one has a [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[57,431,432,935,984,1],"tags":[87],"class_list":["post-4066","post","type-post","status-publish","format-standard","hentry","category-bruce-schneier","category-cryptanalysis","category-mathematics","category-nsa","category-reports","category-uncategorized","tag-bruce-schneier"],"_links":{"self":[{"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/posts\/4066"}],"collection":[{"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/comments?post=4066"}],"version-history":[{"count":0,"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/posts\/4066\/revisions"}],"wp:attachment":[{"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/media?parent=4066"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/categories?post=4066"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/tags?post=4066"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}