{"id":1963,"date":"2026-04-08T14:31:04","date_gmt":"2026-04-08T12:31:04","guid":{"rendered":"https:\/\/exdigit.plus.ac.at\/?p=1963"},"modified":"2026-04-08T14:45:27","modified_gmt":"2026-04-08T12:45:27","slug":"offlinetags-at-the-chemnitz-linux-days","status":"publish","type":"post","link":"https:\/\/exdigit.plus.ac.at\/en\/offlinetags-at-the-chemnitz-linux-days\/","title":{"rendered":"Offlinetags at the Chemnitz Linux Days"},"content":{"rendered":"

Who decides how your own image ends up on the internet? At the 2026 Chemnitz Linux Days (CLT) (https:\/\/chemnitzer.linux-tage.de\/2026\/de\/<\/a>) on March 28 and 29, 2026, every visitor had this choice\u2014in a very concrete and clearly visible way. For the first time at the CLT, so-called Offlinetags (https:\/\/offlinetags.github.io\/<\/a>) were used, a research project by EXDIGIT Professor Frank Pallas (https:\/\/pepsys-group.github.io\/team\/fp<\/a>). The Offlinetags consist of four colored symbols that communicate personal photo preferences at a glance:<\/p>\n

– \u201cNo Photos\u201d — Please do not take any photos of me, even if I do not appear to be identifiable to the viewer of the image.
\n– \u201cBlur me\u201d — Please ensure, before uploading or publishing any image of me, that I am not easily recognizable\u2014especially not through facial recognition technology.
\n– \u201cUpload me\u201d — Uploading and publishing images of me is permitted. Please refrain from tagging and using image recognition technology.
\n– \u201cTag me\u201d — You may photograph me, publish the images, tag them, and use facial recognition technology.<\/p>\n

The concept underscores the CLT 2026 motto: Sovereign Digitality. The two-day conference focused on open source, Linux, and free software is one of the largest of its kind in the German-speaking world, attracting around 3,800 attendees. The program included presentations, workshops, and an exhibition area for companies and open-source projects. EXDIGIT members Frank Pallas and Nicola Leschke contributed to the program with the presentation “(No) Photos Please!” (https:\/\/media.ccc.de\/v\/clt26-325-keine-fotos-bitte<\/a>) and a lightning talk (https:\/\/media.ccc.de\/v\/clt26-63-lightning-talks<\/a>) about the Offlinetags.<\/p>\n

CLT 2026 was the first known use of Offlinetags at an event without a focus on data protection; therefore, the two EXDIGIT members and a team led by Dr. Albrecht Kurze (https:\/\/www.tu-chemnitz.de\/informatik\/mi\/mitarbeiter\/albrecht-kurze.php<\/a>) from the Department of Media Informatics at Chemnitz University of Technology accompanied this implementation with a three-part study: over 170 CLT attendees participated in the preliminary study, the team conducted over 100 interviews during the event, and the follow-up study (https:\/\/bildungsportal.sachsen.de\/umfragen\/limesurvey\/index.php\/336913?newtest=Y&lang=de<\/a>) is still ongoing throughout April.
\nThank you very much for the extensive feedback! The results will be used to improve the Offline Days and for a scientific publication.<\/p>\n","protected":false},"excerpt":{"rendered":"

Who decides how your own image ends up on the internet? At the 2026 Chemnitz Linux Days (CLT) (https:\/\/chemnitzer.linux-tage.de\/2026\/de\/) on March 28 and 29, 2026, every visitor had this choice\u2014in a very concrete and clearly visible way. For the first time at the CLT, so-called Offlinetags (https:\/\/offlinetags.github.io\/) were used, a research project by EXDIGIT Professor […]<\/p>\n","protected":false},"author":3,"featured_media":1966,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[19,17],"tags":[],"class_list":["post-1963","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-exdigit-en","category-exdigit-aktiv-en"],"acf":[],"_links":{"self":[{"href":"https:\/\/exdigit.plus.ac.at\/en\/wp-json\/wp\/v2\/posts\/1963","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/exdigit.plus.ac.at\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/exdigit.plus.ac.at\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/exdigit.plus.ac.at\/en\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/exdigit.plus.ac.at\/en\/wp-json\/wp\/v2\/comments?post=1963"}],"version-history":[{"count":3,"href":"https:\/\/exdigit.plus.ac.at\/en\/wp-json\/wp\/v2\/posts\/1963\/revisions"}],"predecessor-version":[{"id":1969,"href":"https:\/\/exdigit.plus.ac.at\/en\/wp-json\/wp\/v2\/posts\/1963\/revisions\/1969"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/exdigit.plus.ac.at\/en\/wp-json\/wp\/v2\/media\/1966"}],"wp:attachment":[{"href":"https:\/\/exdigit.plus.ac.at\/en\/wp-json\/wp\/v2\/media?parent=1963"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/exdigit.plus.ac.at\/en\/wp-json\/wp\/v2\/categories?post=1963"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/exdigit.plus.ac.at\/en\/wp-json\/wp\/v2\/tags?post=1963"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}