{"id":3104,"date":"2017-05-16T02:04:44","date_gmt":"2017-05-16T10:04:44","guid":{"rendered":"http:\/\/owenmundy.com\/blog\/?p=3104"},"modified":"2017-05-16T02:04:44","modified_gmt":"2017-05-16T10:04:44","slug":"stasi-facebook-big-data-daad-day-11-kerblochkarten","status":"publish","type":"post","link":"https:\/\/owenmundy.com\/blog\/2017\/05\/stasi-facebook-big-data-daad-day-11-kerblochkarten\/","title":{"rendered":"Stasi \/ Facebook \/ Big Data DAAD Day 11 \u2013 Kerblochkarten"},"content":{"rendered":"<p><a href=\"https:\/\/owenmundy.com\/blog\/wp-content\/uploads\/2017\/05\/Kerblochkarte_KeytoPower.png\"><img decoding=\"async\" src=\"https:\/\/owenmundy.com\/blog\/wp-content\/uploads\/2017\/05\/Kerblochkarte_KeytoPower-1024x717.png\" \/><\/a><br \/>\n<span class=\"caption\">A Stasi Kerbloch card<\/span><\/p>\n<p>The Stasi used several other card systems to assist their postal surveillance. The Kerblochkarten (English: Kerbloch cards) system allowed storage of data encoded as a series of hand-made notches. Like other punch card systems, groups of cards could then be automatically processed by a machine based on the presence of notches and a predefined key. The Kerbloch card system made it possible to perform statistical evaluations and targeted searches on up to 350 cards\/persons at a time. Importantly, this card amended the functionality of the the F16 cards and allowed the Stasi to quickly search for potential informants by querying characteristics relevant to a particular job. While anyone who has used a computer spreadsheet software today would take this sorting and searching functionality for granted, this was a highly useful tool for the Stasi, which by 1989 had amassed over 39 million index cards. (The Key to Power, 5)<\/p>\n<ol>\n<li><a href=\"http:\/\/www.bstu.bund.de\/DE\/Archive\/Findmittel\/2013-02-06_schluessel-zur-macht.pdf?__blob=publicationFile\" target=\"_blank\">The key to power: Card indexes and other finding aids practices of State Security<\/a>. Archivar 64. Jahrgang Heft 04 November 2011.<\/li>\n<li>BStU: <a href=\"http:\/\/www.bstu.bund.de\/SiteGlobals\/Forms\/Suchen\/MfSLexikonsuche\/MfSLexikonsuche_Formular.html?nameRange=listK&#038;docId=5081656\" target=\"_blank\">Kerblochkarten<\/a> (KK) <\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"<p>A Stasi Kerbloch card The Stasi used several other card systems to assist their postal surveillance. The Kerblochkarten (English: Kerbloch cards) system allowed storage of data encoded as a series of hand-made notches. Like other punch card systems, groups of cards could then be automatically processed by a machine based on the presence of notches [&#8230;]<\/p>\n<p><a class=\"btn btn-secondary understrap-read-more-link\" href=\"https:\/\/owenmundy.com\/blog\/2017\/05\/stasi-facebook-big-data-daad-day-11-kerblochkarten\/\">Read More&#8230;<span class=\"screen-reader-text\"> from Stasi \/ Facebook \/ Big Data DAAD Day 11 \u2013 Kerblochkarten<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[90],"tags":[133,86,170,31],"class_list":["post-3104","post","type-post","status-publish","format-standard","hentry","category-research","tag-berlin","tag-germany","tag-stasi","tag-surveillance"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p2ovQg-O4","_links":{"self":[{"href":"https:\/\/owenmundy.com\/blog\/wp-json\/wp\/v2\/posts\/3104","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/owenmundy.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/owenmundy.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/owenmundy.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/owenmundy.com\/blog\/wp-json\/wp\/v2\/comments?post=3104"}],"version-history":[{"count":2,"href":"https:\/\/owenmundy.com\/blog\/wp-json\/wp\/v2\/posts\/3104\/revisions"}],"predecessor-version":[{"id":3107,"href":"https:\/\/owenmundy.com\/blog\/wp-json\/wp\/v2\/posts\/3104\/revisions\/3107"}],"wp:attachment":[{"href":"https:\/\/owenmundy.com\/blog\/wp-json\/wp\/v2\/media?parent=3104"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/owenmundy.com\/blog\/wp-json\/wp\/v2\/categories?post=3104"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/owenmundy.com\/blog\/wp-json\/wp\/v2\/tags?post=3104"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}