{"id":14389,"date":"2026-07-18T05:03:24","date_gmt":"2026-07-18T05:03:24","guid":{"rendered":"https:\/\/serisec.com\/index.php\/2026\/07\/18\/details-of-alan-turings-voice-encryption-system-html\/"},"modified":"2026-07-18T05:03:24","modified_gmt":"2026-07-18T05:03:24","slug":"details-of-alan-turings-voice-encryption-system-html","status":"publish","type":"post","link":"https:\/\/serisec.com\/index.php\/2026\/07\/18\/details-of-alan-turings-voice-encryption-system-html\/","title":{"rendered":"Details of Alan Turing\u2019s Voice Encryption System"},"content":{"rendered":"\n<div>Details of Alan Turing\u2019s Voice Encryption System<\/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>Really interesting piece of cryptographic <a href=\"https:\/\/spectrum.ieee.org\/alan-turings-delilah\">history<\/a>:<\/p>\n<blockquote>\n<p>In November 2023, a large cache of his wartime papers\u2014nicknamed the \u201cBayley papers\u201d\u2014was <a href=\"https:\/\/www.bonhams.com\/auction\/28322\/lot\/45\/turing-alan-the-delilah-project-the-papers-of-alan-turing-and-donald-bayley-relating-to-the-delilah-project\/\">auctioned<\/a> in London for almost half a million U.S. dollars. The previously unknown cache contains many sheets in Turing\u2019s own handwriting, telling of his top-secret \u201cDelilah\u201d engineering project from 1943 to 1945. Delilah was Turing\u2019s portable voice-encryption system, named after the biblical deceiver of men. There is also material written by Bayley, often in the form of notes he took while Turing was speaking. It is thanks to Bayley that the papers survived: He kept them until he died in 2020, 66 years after Turing passed away.<\/p>\n<\/blockquote>\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\/2026\/07\/details-of-alan-turings-voice-encryption-system.html\">Go to bruce schneier<\/a><br \/>\n \t<BR><br \/>\n <BR><\/BR><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Details of Alan Turing\u2019s Voice Encryption System Really interesting piece of cryptographic history: In November 2023, a large cache of his wartime papers\u2014nicknamed the \u201cBayley papers\u201d\u2014was auctioned in London for almost half a million U.S. dollars. The previously unknown cache contains many sheets in Turing\u2019s own handwriting, telling of his top-secret \u201cDelilah\u201d engineering project from [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[57,412,897,1],"tags":[87],"class_list":["post-14389","post","type-post","status-publish","format-standard","hentry","category-bruce-schneier","category-encryption","category-history-of-cryptography","category-uncategorized","tag-bruce-schneier"],"_links":{"self":[{"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/posts\/14389"}],"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=14389"}],"version-history":[{"count":0,"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/posts\/14389\/revisions"}],"wp:attachment":[{"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/media?parent=14389"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/categories?post=14389"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/tags?post=14389"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}