{"id":1298,"date":"2016-10-07T16:02:55","date_gmt":"2020-02-18T06:55:22","guid":{"rendered":"https:\/\/redfrontdoor.org\/blg2\/?p=1298"},"modified":"2020-02-18T16:51:27","modified_gmt":"2020-02-18T16:51:27","slug":"post-1292","status":"publish","type":"post","link":"https:\/\/redfrontdoor.org\/blog\/?p=1298","title":{"rendered":"Bletchley Park &#8216;Rectangling&#8217; and LDPC codes"},"content":{"rendered":"<p>For now, this is my final post arising from the <a href=\"http:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/9781119061601.ch0\/summary\">General Report on Tunny<\/a>.  I looked at the connection between:<\/p>\n<ul>\n<li>&#8216;Rectangling&#8217;, part of the cryptanalysis performed by the Bletchley Park codebreakers on the Lorenz cipher, and\n<li>Belief Propagation decoding of LDPC error-correcting codes.<\/li>\n<\/li>\n<\/ul>\n<p>See <a href=\"https:\/\/bennorth.github.io\/rectangling-ldpc\/index.html\">the write-up<\/a> and <a href=\"https:\/\/github.com\/bennorth\/rectangling-ldpc\">code repo<\/a> for details.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>For now, this is my final post arising from the General Report on Tunny. I looked at the connection between: &#8216;Rectangling&#8217;, part of the cryptanalysis performed by the Bletchley Park codebreakers on the Lorenz cipher, and Belief Propagation decoding of LDPC error-correcting codes. See the write-up and code repo for details.<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1298","post","type-post","status-publish","format-standard","hentry","category-uncategorized","comments-off"],"_links":{"self":[{"href":"https:\/\/redfrontdoor.org\/blog\/index.php?rest_route=\/wp\/v2\/posts\/1298","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/redfrontdoor.org\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/redfrontdoor.org\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/redfrontdoor.org\/blog\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/redfrontdoor.org\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1298"}],"version-history":[{"count":1,"href":"https:\/\/redfrontdoor.org\/blog\/index.php?rest_route=\/wp\/v2\/posts\/1298\/revisions"}],"predecessor-version":[{"id":2158,"href":"https:\/\/redfrontdoor.org\/blog\/index.php?rest_route=\/wp\/v2\/posts\/1298\/revisions\/2158"}],"wp:attachment":[{"href":"https:\/\/redfrontdoor.org\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1298"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/redfrontdoor.org\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1298"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/redfrontdoor.org\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1298"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}