https://media.ccc.de/c/bobkonf2026 This feed contains all events from bobkonf2026 as mp4 see video outro Tue, 19 May 2026 16:38:45 -0000 https://static.media.ccc.de/media/events/bobkonf/2026/logo.png https://media.ccc.de/c/bobkonf2026 https://media.ccc.de/v/bob11-2026-digital-sovereignity-kaufmann We've been using the term "digital sovereignty" going on ten years now. But what does that "digital sovereignty" even mean? Looking at research connected to the term shows that it has been used as an argument for very different, sometimes diametrically opposed goals and ideas. Does it even make sense to use it anymore? Licensed to the public under https://creativecommons.org/licenses/by/3.0/de about this event: https://bobkonf.de/2026/stk.html Fri, 13 Mar 2026 09:00:00 +0100 https://cdn.media.ccc.de/events/bobkonf/2026/h264-hd/bob2026-1-eng-Keynote_Digital_Sovereignty_-_Searching_for_Meaning_in_a_Magical_Concept_hd.mp4?1779207680 8f370b8c-6e08-4fc3-a8ea-6e16741f1ab6 2026-03-13T09:00:00+01:00 Stefan Kaufmann No 1, 2026, bob2026, Talk, Talks #1, bob2026-eng, BOB, BOB Konferenz, Day 1 We've been using the term "digital sovereignty" going on ten years now. But what does that "digital sovereignty" even mean? Looking at research connected to the term shows that it has been used as an argument for very different, sometimes diametrically opposed goals and ideas. Does it even make sense to use it anymore? Licensed to the public under https://creativecommons.org/licenses/by/3.0/de about this event: https://bobkonf.de/2026/stk.html 00:49:54 https://media.ccc.de/v/bob11-2026-accessibility-design-engelbrecht Accessibility is often treated as a mere compliance checkbox or something the “UI people” worry about at the end of a project. In reality, accessibility is a core quality attribute of software systems, and many of the biggest wins come from small decisions developers make every day: how we structure HTML, name components, log errors, design APIs, or write tests. In this talk, we look at accessibility from a software engineering perspective. I will introduce the most common types of disabilities and assistive technologies, then show how they map to concrete engineering practices across the stack: semantics (and ARIA) in the frontend, accessible design systems, error message design, and test automation for accessibility. Attendees will leave with a practical checklist they can use in coding and code reviews. The goal is not to make everyone an accessibility expert, but to make accessibility a natural part of our everyday engineering work. Licensed to the public under https://creativecommons.org/licenses/by/3.0/de about this event: https://bobkonf.de/2026/engelbrecht.html Fri, 13 Mar 2026 10:15:00 +0100 https://cdn.media.ccc.de/events/bobkonf/2026/h264-hd/bob2026-9-eng-Accessibility_by_Design_Practical_A11y_for_Everyday_Software_Engineering_hd.mp4?1779208380 2224d8eb-5642-4c18-9880-7eac3c185428 2026-03-13T10:15:00+01:00 Ariadne Engelbrecht No 9, 2026, bob2026, Talk, Talks #2, bob2026-eng, BOB, BOB Konferenz, Day 1 Accessibility is often treated as a mere compliance checkbox or something the “UI people” worry about at the end of a project. In reality, accessibility is a core quality attribute of software systems, and many of the biggest wins come from small decisions developers make every day: how we structure HTML, name components, log errors, design APIs, or write tests. In this talk, we look at accessibility from a software engineering perspective. I will introduce the most common types of disabilities and assistive technologies, then show how they map to concrete engineering practices across the stack: semantics (and ARIA) in the frontend, accessible design systems, error message design, and test automation for accessibility. Attendees will leave with a practical checklist they can use in coding and code reviews. The goal is not to make everyone an accessibility expert, but to make accessibility a natural part of our everyday engineering work. Licensed to the public under https://creativecommons.org/licenses/by/3.0/de about this event: https://bobkonf.de/2026/engelbrecht.html 00:43:07 https://media.ccc.de/v/bob11-2026-ocaml-module-language-woestyne Many programming languages offer modules, namespaces, or package systems. But very few provide **a true module language**. In this talk, we’ll explore OCaml’s powerful module system as a core language feature. We’ll learn how to use modules effectively, understand their design principles and limitations, and discuss the challenges posed by type equalities, type preservation, and strengthening. We’ll also look at ongoing work clarifying their semantics, including recursive modules, type anchoring, and signature avoidance. We’ll see how modules solve real problems, discover clever and expressive encodings, and identify their practical limits. Along the way, we’ll build familiarity with key concepts such as functors, applicative and generative functors, ascriptions, and strengthening and understand how OCaml’s module language enables elegant, modular, and type-safe program design. Licensed to the public under https://creativecommons.org/licenses/by/3.0/de about this event: https://bobkonf.de/2026/woestyne.html Fri, 13 Mar 2026 10:15:00 +0100 https://cdn.media.ccc.de/events/bobkonf/2026/h264-hd/bob2026-2-eng-A_crash_course_on_the_OCaml_module_language_hd.mp4?1779208027 da9a9d6f-dafd-48c1-8dd4-47f6a2eb34b8 2026-03-13T10:15:00+01:00 Xavier Van de Woestyne No 2, 2026, bob2026, Talk, Talks #1, bob2026-eng, BOB, BOB Konferenz, Day 1 Many programming languages offer modules, namespaces, or package systems. But very few provide **a true module language**. In this talk, we’ll explore OCaml’s powerful module system as a core language feature. We’ll learn how to use modules effectively, understand their design principles and limitations, and discuss the challenges posed by type equalities, type preservation, and strengthening. We’ll also look at ongoing work clarifying their semantics, including recursive modules, type anchoring, and signature avoidance. We’ll see how modules solve real problems, discover clever and expressive encodings, and identify their practical limits. Along the way, we’ll build familiarity with key concepts such as functors, applicative and generative functors, ascriptions, and strengthening and understand how OCaml’s module language enables elegant, modular, and type-safe program design. Licensed to the public under https://creativecommons.org/licenses/by/3.0/de about this event: https://bobkonf.de/2026/woestyne.html 00:44:08 https://media.ccc.de/v/bob11-2026-undoable-monad-elliot Slipshow is a presentation tool. One of its specificity is that it is not based on slides, but on an infinite canvas on which you can zoom or scroll. Yet, compared to Prezi, the source of a presentation is text. The way the author defines the dynamic of its presentation is by intertwining actions in its textual content. Slipshow allows many actions, such as revealing new content, scrolling or zooming, starting an animation, or even starting a script defined by the user. This gives the author freedom in how they want to present. However, for Slipshow itself, this is a programming challenge: How to allow to go back in your presentation's steps? How to organize the code so that it's not restricting to adding new actions, and that it's easy to maintain? Originally written in JavaScript, Slipshow has suffered from bad design in this space. However, since its rewrite in OCaml, the opportunity to tackle this problem has been taken, with great success and much more stability, using the Undoable Monad. Monads are a way to embed a "computing" DSL in a programming language. They allow to define a "variant" of computation (for instance "concurrent programming") and let the user program in that new way, almost transparently. The Undoable Monad provides an excellent example of monad: it is simple enough, yet solves a real problem in an elegant way. This talk is a fun and practical introduction to monadic programming. Licensed to the public under https://creativecommons.org/licenses/by/3.0/de about this event: https://bobkonf.de/2026/paul-elliot.html Fri, 13 Mar 2026 11:05:00 +0100 https://cdn.media.ccc.de/events/bobkonf/2026/h264-hd/bob2026-3-eng-Going_back_in_time_with_the_Undoable_Monad_hd.mp4?1779208725 aef73580-5ac6-437f-bf3e-7780af9123e7 2026-03-13T11:05:00+01:00 Paul-Elliot No 3, 2026, bob2026, Talk, Talks #1, bob2026-eng, BOB, BOB Konferenz, Day 1 Slipshow is a presentation tool. One of its specificity is that it is not based on slides, but on an infinite canvas on which you can zoom or scroll. Yet, compared to Prezi, the source of a presentation is text. The way the author defines the dynamic of its presentation is by intertwining actions in its textual content. Slipshow allows many actions, such as revealing new content, scrolling or zooming, starting an animation, or even starting a script defined by the user. This gives the author freedom in how they want to present. However, for Slipshow itself, this is a programming challenge: How to allow to go back in your presentation's steps? How to organize the code so that it's not restricting to adding new actions, and that it's easy to maintain? Originally written in JavaScript, Slipshow has suffered from bad design in this space. However, since its rewrite in OCaml, the opportunity to tackle this problem has been taken, with great success and much more stability, using the Undoable Monad. Monads are a way to embed a "computing" DSL in a programming language. They allow to define a "variant" of computation (for instance "concurrent programming") and let the user program in that new way, almost transparently. The Undoable Monad provides an excellent example of monad: it is simple enough, yet solves a real problem in an elegant way. This talk is a fun and practical introduction to monadic programming. Licensed to the public under https://creativecommons.org/licenses/by/3.0/de about this event: https://bobkonf.de/2026/paul-elliot.html 00:42:23 media.ccc.de / RSS 0.3.2 CCC media team media@c3voc.de CCC media team No CCC Congress Hacking Security Netzpolitik A wide variety of video material distributed by the CCC. All content is taken from cdn.media.ccc.de and media.ccc.de A wide variety of video material distributed by the Chaos Computer Club. This feed contains all events from bobkonf2026 as mp4