https://media.ccc.de/c/matrix-conf-2026 This feed contains all events from matrix-conf-2026 as webm see video outro Wed, 21 Oct 2026 17:37:56 -0000 https://static.media.ccc.de/media/events/matrix-conf/2026/logo.png https://media.ccc.de/c/matrix-conf-2026 https://media.ccc.de/v/matrix-conference-2026-102272-element-s-year-in-review-interoperability-in-the-real-world A fast-paced tour of everything we’ve been up to at Element in the past year, as well as what to expect in the future. This year's highlights centre on Element's work to make Matrix genuinely interoperable for governments and large organisations in the wild. We’ll cover what’s gone into ESS Pro and Element Pro, as well as the migration from Classic. We’ll also give an overview of all the goodies that have landed in Element X, Element Call, Element and Web. Not to mention our continued investment in protocol research. Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.2026.matrix.org/matrix-conference-2026/talk/SFHGBL/ Wed, 21 Oct 2026 10:45:00 +0200 https://cdn.media.ccc.de/events/matrix-conf/2026/webm-hd/matrix-conf-2026-102272-eng-Elements_year_in_review_Interoperability_in_the_real_world_webm-hd.webm?1792602275 47cc3760-ac46-534a-8758-cf0842962208 2026-10-21T10:45:00+02:00 Neil Johnson No SFHGBL, 2026, matrix-conf-2026, Keynote, Sofya, matrix-conf-2026-eng, matrix-conf-2026, Day 2 A fast-paced tour of everything we’ve been up to at Element in the past year, as well as what to expect in the future. This year's highlights centre on Element's work to make Matrix genuinely interoperable for governments and large organisations in the wild. We’ll cover what’s gone into ESS Pro and Element Pro, as well as the migration from Classic. We’ll also give an overview of all the goodies that have landed in Element X, Element Call, Element and Web. Not to mention our continued investment in protocol research. Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.2026.matrix.org/matrix-conference-2026/talk/SFHGBL/ 00:25:41 https://media.ccc.de/v/matrix-conference-2026-100709-from-helplessness-to-sovereignty-matrix-as-a-use-case-for-fairer-information-infrastructure The privacy paradox (the theory that people say they care about their privacy but behave as if they do not), assumes that user behaviours are irrational, uninformed, and based on choosing convenience above their own data protection. My research points to a different perspective: people do care, and they also behave inconsistently, but not always out of convenience. At its core, it seems that people behave inconsistently because they feel they have no agency and that “there is no point” in trying to protect their personal information. In this sense, we all live more in a state of privacy helplessness than in a paradox – a paradox implies a choice we don’t all have. Regulations like the GDPR can’t be the sole solution for such a widespread and structural issue, nor are they a substitute for measures which focus on actual empowerment. Geopolitical considerations are also leading private organisations and governments to more carefully ownership and control of their data, which leads to questions around autonomy and digital sovereignty. In this talk I will go through the reasons why decentralised, end-to-end-encrypted public infrastructure, built on open standards, could be the structural answer to these problems. Matrix is one of the few working examples of this kind of technology being deployed in the public sector at scale. Matrix based communications are a key case study to show why open technology is essential to address individual concerns around helplessness, as well as national level issues associated with digital sovereignty (or lack of it). Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.2026.matrix.org/matrix-conference-2026/talk/QXZEQJ/ Wed, 21 Oct 2026 16:45:00 +0200 https://cdn.media.ccc.de/events/matrix-conf/2026/webm-hd/matrix-conf-2026-100709-eng-From_helplessness_to_sovereignty_Matrix_as_a_use_case_for_fairer_information_infrastructure_webm-hd.webm?1792601021 3430de61-b448-5e2b-b4ec-b8c90e523784 2026-10-21T16:45:00+02:00 Denise Almeida No QXZEQJ, 2026, matrix-conf-2026, Digital Sovereignty, Peter, matrix-conf-2026-eng, matrix-conf-2026, Day 2 The privacy paradox (the theory that people say they care about their privacy but behave as if they do not), assumes that user behaviours are irrational, uninformed, and based on choosing convenience above their own data protection. My research points to a different perspective: people do care, and they also behave inconsistently, but not always out of convenience. At its core, it seems that people behave inconsistently because they feel they have no agency and that “there is no point” in trying to protect their personal information. In this sense, we all live more in a state of privacy helplessness than in a paradox – a paradox implies a choice we don’t all have. Regulations like the GDPR can’t be the sole solution for such a widespread and structural issue, nor are they a substitute for measures which focus on actual empowerment. Geopolitical considerations are also leading private organisations and governments to more carefully ownership and control of their data, which leads to questions around autonomy and digital sovereignty. In this talk I will go through the reasons why decentralised, end-to-end-encrypted public infrastructure, built on open standards, could be the structural answer to these problems. Matrix is one of the few working examples of this kind of technology being deployed in the public sector at scale. Matrix based communications are a key case study to show why open technology is essential to address individual concerns around helplessness, as well as national level issues associated with digital sovereignty (or lack of it). Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.2026.matrix.org/matrix-conference-2026/talk/QXZEQJ/ 00:18:00 https://media.ccc.de/v/matrix-conference-2026-101034-project-hydra-phase-2-3-further-improving-the-security-of-the-federation-protocol The federation protocol is how Matrix homeservers communicate between each other. In private federations this isn't particularly challenging as the network is trusted but in the public federation this isn't true. This talk dives into what protocol improvements are in the works to make the public federation more secure against Byzantine actors, particularly against "backdating": intentional misuse of the concurrency primitives to manipulate the authorisation algorithm. We'll explore why this problem is hard, what some of the failure modes are, and how we are working on addressing them. Some of this work was presented in a [peer-reviewed article](https://dl.acm.org/doi/10.1145/3806077.3806691). Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.2026.matrix.org/matrix-conference-2026/talk/M3A3HK/ Wed, 21 Oct 2026 15:15:00 +0200 https://cdn.media.ccc.de/events/matrix-conf/2026/webm-hd/matrix-conf-2026-101034-eng-Project_Hydra_phase_2_3_further_improving_the_security_of_the_federation_protocol_webm-hd.webm?1792601318 9afe8933-a3e5-5c81-add5-e73168d5b046 2026-10-21T15:15:00+02:00 Kegan Dougal No M3A3HK, 2026, matrix-conf-2026, Next Gen Spec, Sofya, matrix-conf-2026-eng, matrix-conf-2026, Day 2 The federation protocol is how Matrix homeservers communicate between each other. In private federations this isn't particularly challenging as the network is trusted but in the public federation this isn't true. This talk dives into what protocol improvements are in the works to make the public federation more secure against Byzantine actors, particularly against "backdating": intentional misuse of the concurrency primitives to manipulate the authorisation algorithm. We'll explore why this problem is hard, what some of the failure modes are, and how we are working on addressing them. Some of this work was presented in a [peer-reviewed article](https://dl.acm.org/doi/10.1145/3806077.3806691). Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.2026.matrix.org/matrix-conference-2026/talk/M3A3HK/ 00:27:28 https://media.ccc.de/v/matrix-conference-2026-103132-sovereignty-meets-interoperability-the-european-commission-s-matrix-story Enhancing open standards and data ownership within its ecosystem, the European Commission is walking the (sovereign) talk by introducing a new Digital Workplace service powered by Matrix / Element. This talk walks you through the EC's journey from early architecture decisions to deploying a production ready communication service. We will share the practical reality of integrating Matrix into a large-scale institutional ecosystem - balancing strict security and compliance requirements with user experience and the key lessons learned along the way. Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.2026.matrix.org/matrix-conference-2026/talk/YHV8XB/ Wed, 21 Oct 2026 15:15:00 +0200 https://cdn.media.ccc.de/events/matrix-conf/2026/webm-hd/matrix-conf-2026-103132-eng-Sovereignty_meets_Interoperability_The_European_Commissions_Matrix_Story_webm-hd.webm?1792599394 5c9f4281-fb10-5844-91d2-9e0c363a0444 2026-10-21T15:15:00+02:00 Alexandru VIGNIDE, Diana GHEORGHE No YHV8XB, 2026, matrix-conf-2026, Public Sector sponsored by Element, Katherine, matrix-conf-2026-eng, matrix-conf-2026, Day 2 Enhancing open standards and data ownership within its ecosystem, the European Commission is walking the (sovereign) talk by introducing a new Digital Workplace service powered by Matrix / Element. This talk walks you through the EC's journey from early architecture decisions to deploying a production ready communication service. We will share the practical reality of integrating Matrix into a large-scale institutional ecosystem - balancing strict security and compliance requirements with user experience and the key lessons learned along the way. Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.2026.matrix.org/matrix-conference-2026/talk/YHV8XB/ 00:20:49 https://media.ccc.de/v/matrix-conference-2026-103131-forrester-report-open-source-and-open-standards-for-sovereignty-privacy-and-security Digital sovereignty is a board-level priority, but ambition often outpaces reality. In this session, Forrester analyst Dario Maisto presents findings from his latest report, drawing a clear line between sovereignty, privacy, and security, and examining the practical challenges organisations face in reducing dependency on dominant tech stacks, from productivity suites to communication. He explores how open standards and open source can support sovereignty goals, introducing a Minimum Viable Sovereignty framework for setting realistic targets. The session also addresses the limits of open source, including project health, maintainer sustainability, and commercial support, as key factors in mission-critical viability, leaving attendees with a grounded framework for evaluating sovereignty initiatives. Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.2026.matrix.org/matrix-conference-2026/talk/KZM8NW/ Wed, 21 Oct 2026 15:45:00 +0200 https://cdn.media.ccc.de/events/matrix-conf/2026/webm-hd/matrix-conf-2026-103131-eng-Forrester_Report_Open_source_and_open_standards_for_sovereignty_privacy_and_security_webm-hd.webm?1792599791 63bf2d8d-20f3-5014-badf-a5329470400f 2026-10-21T15:45:00+02:00 Dario Maisto No KZM8NW, 2026, matrix-conf-2026, Digital Sovereignty, Katherine, matrix-conf-2026-eng, matrix-conf-2026, Day 2 Digital sovereignty is a board-level priority, but ambition often outpaces reality. In this session, Forrester analyst Dario Maisto presents findings from his latest report, drawing a clear line between sovereignty, privacy, and security, and examining the practical challenges organisations face in reducing dependency on dominant tech stacks, from productivity suites to communication. He explores how open standards and open source can support sovereignty goals, introducing a Minimum Viable Sovereignty framework for setting realistic targets. The session also addresses the limits of open source, including project health, maintainer sustainability, and commercial support, as key factors in mission-critical viability, leaving attendees with a grounded framework for evaluating sovereignty initiatives. Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.2026.matrix.org/matrix-conference-2026/talk/KZM8NW/ 00:20:23 https://media.ccc.de/v/matrix-conference-2026-100881-robrix-a-pure-rust-multi-platform-matrix-client-and-a-peek-at-its-future Robrix is a "new" FOSS Matrix client written entirely from scratch in Rust, with some cool power user features like a **dockable-tabs view** of multiple rooms side-by-side, just like your favorite IDE. It's simple and flexible enough for casual chatters as well, and can seamlessly transition into a sleek mobile-friendly adaptive UI for narrow screens. Robrix runs smoothly and consistently across mobile & desktop platforms, thanks to the underlying Makepad UI toolkit and Robius abstraction crates, which we also wrote ourselves in Rust. After several years of hard work on those components, we have finally reached the milestone of publishing Robrix to major app stores. Join us to learn more, see some fun live demos, and give it a try yourself. We'll also preview some of our future ideas, such as making Matrix the best medium for coordinating and managing multi-agent workflows (even better than Telegram!). [Robrix](https://github.com/project-robius/robrix) began as a flagship application test case and driver for the cross-platform development of [Makepad](https://github.com/makepad/makepad) and [Robius](https://github.com/project-robius), but has since become a real project in its own right. While it's not yet 100% complete, we've achieved near feature parity with other big Matrix clients, and that gap is closing every week. ### First half: current state + demo In the first half of this talk, we'll give an overview and live demo of Robrix's current design and core Matrix functionality. Beyond the goals of flexibility and productivity for users who want it, we also prioritize consistency: all UI experiences and features are available on **every device** and **every platform** – we don't restrict features just because you're on your phone. While Robrix itself is platform-independent (aka, easy to contribute to! 😊), it runs natively on iOS, Android, macOS, Windows, and Linux (X11 & Wayland). Web/WASM and HarmonyOS/OpenHarmony are mostly supported but need a bit of TLC. Importantly, since we control the entire stack, we can achieve deep integration with underlying OS services and platform features, all without a heavyweight framework or web engine like Electron. Integration layers can even be customized, allowing us to improve upon known limitations of other frameworks like Flutter. Publishing Robrix to app stores has also validated our earliest objective: one can successfully distribute cross-platform Rust apps through platform-native channels despite bypassing those platforms' native UI frameworks and build systems. ### Second half: future & in-progress work In the second half of this talk, we'll explore some potential future directions. One example is leveraging Matrix as the medium for coordinating and managing multi-agent workflows, which are becoming increasingly popular. We envision an agent being able to generate or download dynamic "mini-apps" written in *Splash*, Makepad 2.0's UI scripting language, that can be safely interpreted in a streaming manner within a resource-isolated sandbox. This would enable an agent to create things like a **custom interactive status dashboard** _directly within a room_, which would be accessible on any device, even restricted systems like iOS. We could even inject custom dependencies, such as the Matrix Widget API, into a custom Splash mini-app to enable it to access room info, user context, and timelines with the existing capability-based permissions model. This combination of Robrix's rich UI and the Matrix Widget API could elevate Matrix to become the ideal choice for agent coordination, surpassing Telegram, the de facto choice for chat-room-like coordination between agents. Beyond that, we'd also like to experiment with integrating *on-device* models for simpler, more practical utility features, e.g., summarizing a few weeks of missed messages in an E2EE room (preserving privacy) or answering user questions based on room history. Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.2026.matrix.org/matrix-conference-2026/talk/PUQNED/ Wed, 21 Oct 2026 15:15:00 +0200 https://cdn.media.ccc.de/events/matrix-conf/2026/webm-hd/matrix-conf-2026-100881-eng-Robrix_a_pure_Rust_multi-platform_Matrix_client_and_a_peek_at_its_future_webm-hd.webm?1792599785 c6d51c10-b440-500f-8010-710aeaf5ec5c 2026-10-21T15:15:00+02:00 Kevin Boos No PUQNED, 2026, matrix-conf-2026, Matrix Inside, Peter, matrix-conf-2026-eng, matrix-conf-2026, Day 2 Robrix is a "new" FOSS Matrix client written entirely from scratch in Rust, with some cool power user features like a **dockable-tabs view** of multiple rooms side-by-side, just like your favorite IDE. It's simple and flexible enough for casual chatters as well, and can seamlessly transition into a sleek mobile-friendly adaptive UI for narrow screens. Robrix runs smoothly and consistently across mobile & desktop platforms, thanks to the underlying Makepad UI toolkit and Robius abstraction crates, which we also wrote ourselves in Rust. After several years of hard work on those components, we have finally reached the milestone of publishing Robrix to major app stores. Join us to learn more, see some fun live demos, and give it a try yourself. We'll also preview some of our future ideas, such as making Matrix the best medium for coordinating and managing multi-agent workflows (even better than Telegram!). [Robrix](https://github.com/project-robius/robrix) began as a flagship application test case and driver for the cross-platform development of [Makepad](https://github.com/makepad/makepad) and [Robius](https://github.com/project-robius), but has since become a real project in its own right. While it's not yet 100% complete, we've achieved near feature parity with other big Matrix clients, and that gap is closing every week. ### First half: current state + demo In the first half of this talk, we'll give an overview and live demo of Robrix's current design and core Matrix functionality. Beyond the goals of flexibility and productivity for users who want it, we also prioritize consistency: all UI experiences and features are available on **every device** and **every platform** – we don't restrict features just because you're on your phone. While Robrix itself is platform-independent (aka, easy to contribute to! 😊), it runs natively on iOS, Android, macOS, Windows, and Linux (X11 & Wayland). Web/WASM and HarmonyOS/OpenHarmony are mostly supported but need a bit of TLC. Importantly, since we control the entire stack, we can achieve deep integration with underlying OS services and platform features, all without a heavyweight framework or web engine like Electron. Integration layers can even be customized, allowing us to improve upon known limitations of other frameworks like Flutter. Publishing Robrix to app stores has also validated our earliest objective: one can successfully distribute cross-platform Rust apps through platform-native channels despite bypassing those platforms' native UI frameworks and build systems. ### Second half: future & in-progress work In the second half of this talk, we'll explore some potential future directions. One example is leveraging Matrix as the medium for coordinating and managing multi-agent workflows, which are becoming increasingly popular. We envision an agent being able to generate or download dynamic "mini-apps" written in *Splash*, Makepad 2.0's UI scripting language, that can be safely interpreted in a streaming manner within a resource-isolated sandbox. This would enable an agent to create things like a **custom interactive status dashboard** _directly within a room_, which would be accessible on any device, even restricted systems like iOS. We could even inject custom dependencies, such as the Matrix Widget API, into a custom Splash mini-app to enable it to access room info, user context, and timelines with the existing capability-based permissions model. This combination of Robrix's rich UI and the Matrix Widget API could elevate Matrix to become the ideal choice for agent coordination, surpassing Telegram, the de facto choice for chat-room-like coordination between agents. Beyond that, we'd also like to experiment with integrating *on-device* models for simpler, more practical utility features, e.g., summarizing a few weeks of missed messages in an E2EE room (preserving privacy) or answering user questions based on room history. Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.2026.matrix.org/matrix-conference-2026/talk/PUQNED/ 00:24:41 https://media.ccc.de/v/matrix-conference-2026-102410-as-a-server-administrator-i-want-to-run-element-successfully-in-my-organisation-community Introducing a new communication tool into an existing organisation or community usually means training users and addressing their common pain points as best as possible. Over the last few years, Element Server Suite (ESS) has empowered administrators to integrate Element in a way that makes sense for their organisations, through tools like Element Admin and recent improvements in the rest of the Matrix stack. This talk will go through what the Element stack has to offer in terms of administration tooling, UX improvements for onboarding new users and integration with existing user directories. This includes concrete user-facing features like QR code login and many features introduced with Matrix Authentication Service, but also leveraging new features in the Matrix spec like extensible profiles. Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.2026.matrix.org/matrix-conference-2026/talk/NBEB99/ Wed, 21 Oct 2026 15:45:00 +0200 https://cdn.media.ccc.de/events/matrix-conf/2026/webm-hd/matrix-conf-2026-102410-eng-As_a_server_administrator_I_want_to_run_Element_successfully_in_my_organisation_community_webm-hd.webm?1792599797 eed8f269-c7d1-5e3e-a51a-7635ba27dca6 2026-10-21T15:45:00+02:00 Quentin Gliech No NBEB99, 2026, matrix-conf-2026, Matrix Inside, Peter, matrix-conf-2026-eng, matrix-conf-2026, Day 2 Introducing a new communication tool into an existing organisation or community usually means training users and addressing their common pain points as best as possible. Over the last few years, Element Server Suite (ESS) has empowered administrators to integrate Element in a way that makes sense for their organisations, through tools like Element Admin and recent improvements in the rest of the Matrix stack. This talk will go through what the Element stack has to offer in terms of administration tooling, UX improvements for onboarding new users and integration with existing user directories. This includes concrete user-facing features like QR code login and many features introduced with Matrix Authentication Service, but also leveraging new features in the Matrix spec like extensible profiles. Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.2026.matrix.org/matrix-conference-2026/talk/NBEB99/ 00:24:09 https://media.ccc.de/v/matrix-conference-2026-101803-a-common-journey-to-user-federated-search Currently user search can only be done locally, which would at best get a list of all users known to the server. This talk aims at explaining the research we did regarding speccing and implementing a spec change proposal for the user federated search (MSC4258). We will also explained the different solutions we thought about and the associated tradeoffs regarding data privacy, performance and complexity. This talk is also about a collaboration between 2 public sector teams from 2 different countries :) Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.2026.matrix.org/matrix-conference-2026/talk/V9PXRV/ Wed, 21 Oct 2026 15:45:00 +0200 https://cdn.media.ccc.de/events/matrix-conf/2026/webm-hd/matrix-conf-2026-101803-eng-A_common_journey_to_user_federated_search_webm-hd.webm?1792597788 faa16000-1c16-5f90-8f05-fe79769ba31a 2026-10-21T15:45:00+02:00 Kai A. Hiller, Maghen Calinghee No V9PXRV, 2026, matrix-conf-2026, Next Gen Spec, Sofya, matrix-conf-2026-eng, matrix-conf-2026, Day 2 Currently user search can only be done locally, which would at best get a list of all users known to the server. This talk aims at explaining the research we did regarding speccing and implementing a spec change proposal for the user federated search (MSC4258). We will also explained the different solutions we thought about and the associated tradeoffs regarding data privacy, performance and complexity. This talk is also about a collaboration between 2 public sector teams from 2 different countries :) Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.2026.matrix.org/matrix-conference-2026/talk/V9PXRV/ 00:22:37 https://media.ccc.de/v/matrix-conference-2026-100909-fluffychat-creating-a-matrix-messenger-for-individuals From user discovery and end to end encryption to push notifications: how the requirements for a matrix messenger differs if the target audiance are individuals instead of businesses. Since 2017 I'm developing FluffyChat, first for Ubuntu Touch and since 2020 also for Android, iOS, Web and Linux. Always with one goal in mind: Target individuals instead of businesses and therefore as a non profit project. In this talk I would like to outline how I have different user groups in mind when designing new features, how to make user discovery or end to end encryption easy to use but also powerful. Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.2026.matrix.org/matrix-conference-2026/talk/DMFPLT/ Wed, 21 Oct 2026 13:00:00 +0200 https://cdn.media.ccc.de/events/matrix-conf/2026/webm-hd/matrix-conf-2026-100909-eng-FluffyChat_-_Creating_a_matrix_messenger_for_individuals_webm-hd.webm?1792597503 c5939e1e-e515-58ad-a836-9aeeb7675e7d 2026-10-21T13:00:00+02:00 Krille (Christian K.) No DMFPLT, 2026, matrix-conf-2026, Matrix Inside, Peter, matrix-conf-2026-eng, matrix-conf-2026, Day 2 From user discovery and end to end encryption to push notifications: how the requirements for a matrix messenger differs if the target audiance are individuals instead of businesses. Since 2017 I'm developing FluffyChat, first for Ubuntu Touch and since 2020 also for Android, iOS, Web and Linux. Always with one goal in mind: Target individuals instead of businesses and therefore as a non profit project. In this talk I would like to outline how I have different user groups in mind when designing new features, how to make user discovery or end to end encryption easy to use but also powerful. Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.2026.matrix.org/matrix-conference-2026/talk/DMFPLT/ 00:31:22 https://media.ccc.de/v/matrix-conference-2026-100443-the-matrix-state-of-the-union In which Matthew gives all the latest updates on Matrix - including ecosystem uptake, new clients, new servers, new MSCs, Hydra Phase 2 and 3 progress, P2P Matrix, MatrixRTC maturity, where (D)MLS fits in, and more! Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.2026.matrix.org/matrix-conference-2026/talk/BVPGVY/ Wed, 21 Oct 2026 10:15:00 +0200 https://cdn.media.ccc.de/events/matrix-conf/2026/webm-hd/matrix-conf-2026-100443-eng-The_Matrix_State_of_the_Union_webm-hd.webm?1792596204 67a308e3-64b3-5a7e-bea8-0cbe54d23087 2026-10-21T10:15:00+02:00 Matthew Hodgson No BVPGVY, 2026, matrix-conf-2026, Keynote, Sofya, matrix-conf-2026-eng, matrix-conf-2026, Day 2 In which Matthew gives all the latest updates on Matrix - including ecosystem uptake, new clients, new servers, new MSCs, Hydra Phase 2 and 3 progress, P2P Matrix, MatrixRTC maturity, where (D)MLS fits in, and more! Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.2026.matrix.org/matrix-conference-2026/talk/BVPGVY/ 00:28:24 https://media.ccc.de/v/matrix-conference-2026-101050-federated-scheduling-integrating-jscalendar-rfc-8984-into-matrix Matrix already provides the essential primitives for a decentralized calendar: room memberships, federated state exchange, spaces, and support for custom event and room types. This session explores the technical integration of RFC 8984 (JSCalendar) within the Matrix protocol. We will examine how the JSON-based representation of JSCalendar can be mapped to Matrix state events and what pieces are missing. The presentation concludes with a live demonstration of a working prototype within Tammy. Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.2026.matrix.org/matrix-conference-2026/talk/WWLM98/ Wed, 21 Oct 2026 14:45:00 +0200 https://cdn.media.ccc.de/events/matrix-conf/2026/webm-hd/matrix-conf-2026-101050-eng-Federated_Scheduling_Integrating_JSCalendar_RFC_8984_into_Matrix_webm-hd.webm?1792596608 cd0115a5-5a03-5eb5-8531-5227aaa901cb 2026-10-21T14:45:00+02:00 Benedict Benken, Michael Thiele No WWLM98, 2026, matrix-conf-2026, Next Gen Spec, Sofya, matrix-conf-2026-eng, matrix-conf-2026, Day 2 Matrix already provides the essential primitives for a decentralized calendar: room memberships, federated state exchange, spaces, and support for custom event and room types. This session explores the technical integration of RFC 8984 (JSCalendar) within the Matrix protocol. We will examine how the JSON-based representation of JSCalendar can be mapped to Matrix state events and what pieces are missing. The presentation concludes with a live demonstration of a working prototype within Tammy. Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.2026.matrix.org/matrix-conference-2026/talk/WWLM98/ 00:24:09 https://media.ccc.de/v/matrix-conference-2026-101809-server-side-functionality-for-multilateral-use To make the most of the sovereignty and interoperability enabled by Matrix, governments need to deploy at scale; across multiple organisations within their own country, between partner countries and mission partner environments. At an even larger scale, they may also need to support government to citizen communications - literally tens or even hundreds of millions of people. This session explores what’s required to deliver these types of production environments straight out of the box. We'll cover server-side interoperability, mixing and matching Element Server Suite Pro with other Matrix-based solutions without friction, and how to make federation genuinely easy to deploy and manage - within large organisations and with external partners. For example, when you federate with a partner you should be able to find your colleague in their directory. You should be able to share files with them and collaborate seamlessly, but also safely and in a controlled manner; such as checking what goes in and out of your network with proven Secure Border Gateways. Finally, we'll explore air-gapped deployments and cross-domain functionality - enabling secure communications across classification boundaries where external connectivity simply isn't an option. Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.2026.matrix.org/matrix-conference-2026/talk/CWLX8Z/ Wed, 21 Oct 2026 14:45:00 +0200 https://cdn.media.ccc.de/events/matrix-conf/2026/webm-hd/matrix-conf-2026-101809-eng-Server-side_functionality_for_multilateral_use_webm-hd.webm?1792597509 2fc92e03-8ced-5b03-a929-46fdd9179ba2 2026-10-21T14:45:00+02:00 Patrick Maier No CWLX8Z, 2026, matrix-conf-2026, Public Sector sponsored by Element, Katherine, matrix-conf-2026-eng, matrix-conf-2026, Day 2 To make the most of the sovereignty and interoperability enabled by Matrix, governments need to deploy at scale; across multiple organisations within their own country, between partner countries and mission partner environments. At an even larger scale, they may also need to support government to citizen communications - literally tens or even hundreds of millions of people. This session explores what’s required to deliver these types of production environments straight out of the box. We'll cover server-side interoperability, mixing and matching Element Server Suite Pro with other Matrix-based solutions without friction, and how to make federation genuinely easy to deploy and manage - within large organisations and with external partners. For example, when you federate with a partner you should be able to find your colleague in their directory. You should be able to share files with them and collaborate seamlessly, but also safely and in a controlled manner; such as checking what goes in and out of your network with proven Secure Border Gateways. Finally, we'll explore air-gapped deployments and cross-domain functionality - enabling secure communications across classification boundaries where external connectivity simply isn't an option. Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.2026.matrix.org/matrix-conference-2026/talk/CWLX8Z/ 00:21:26 https://media.ccc.de/v/matrix-conference-2026-101042-neoboard-at-scale-demo NeoBoard, the open-source real-time collaborative whiteboard built on the Matrix protocol, has come a long way since its first appearance at the Matrix Conference. In this talk, Nordeck's CEO gives an honest account of where the product stands today — the architecture, the open-source release, the feature roadmap — and announces some surprises that take NeoBoard beyond the developer community and into everyday use. A concise overview of the current state: the dual form factor (Matrix widget for Element Web and a standalone Matrix client), the open-source release under AGPL-3.0, the infinite canvas, CRDT-based real-time collaboration via MatrixRTC, and the product's place within the openDesk suite. This sets the stage for an audience that may know NeoBoard from previous conferences but wants to understand where the product is in mid-2026. The deployment at "DAP Digitaler Arbeitsplatz für Lehrer in Baden-Württemberg" for 86K users will be NeoBoard's largest public-sector deployment, and sits within the broader openDesk ecosystem already serving tens of thousands of users across German public institutions. We will share lessons from the discovery and evaluation process, what it takes to deploy a Matrix-based tool at this scale, and what the education sector demands from a collaborative whiteboard. Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.2026.matrix.org/matrix-conference-2026/talk/7BLS3N/ Wed, 21 Oct 2026 14:45:00 +0200 https://cdn.media.ccc.de/events/matrix-conf/2026/webm-hd/matrix-conf-2026-101042-eng-NeoBoard_at_scale_-_Demo_webm-hd.webm?1792597783 8e7cd361-162e-5c8e-83f8-6428cd75a4d0 2026-10-21T14:45:00+02:00 Hato Nordeck No 7BLS3N, 2026, matrix-conf-2026, Matrix Inside, Peter, matrix-conf-2026-eng, matrix-conf-2026, Day 2 NeoBoard, the open-source real-time collaborative whiteboard built on the Matrix protocol, has come a long way since its first appearance at the Matrix Conference. In this talk, Nordeck's CEO gives an honest account of where the product stands today — the architecture, the open-source release, the feature roadmap — and announces some surprises that take NeoBoard beyond the developer community and into everyday use. A concise overview of the current state: the dual form factor (Matrix widget for Element Web and a standalone Matrix client), the open-source release under AGPL-3.0, the infinite canvas, CRDT-based real-time collaboration via MatrixRTC, and the product's place within the openDesk suite. This sets the stage for an audience that may know NeoBoard from previous conferences but wants to understand where the product is in mid-2026. The deployment at "DAP Digitaler Arbeitsplatz für Lehrer in Baden-Württemberg" for 86K users will be NeoBoard's largest public-sector deployment, and sits within the broader openDesk ecosystem already serving tens of thousands of users across German public institutions. We will share lessons from the discovery and evaluation process, what it takes to deploy a Matrix-based tool at this scale, and what the education sector demands from a collaborative whiteboard. Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.2026.matrix.org/matrix-conference-2026/talk/7BLS3N/ 00:22:31 https://media.ccc.de/v/matrix-conference-2026-101088-bringing-matrixrtc-to-the-matrix-ecosystem Element Call already proves what is possible with MatrixRTC: decentralised, federated, end-to-end encrypted video and voice calls powered entirely by the Matrix protocol — but most of the Matrix ecosystem hasn't yet adopted it. To change this we need to build an ecosystem around MatrixRTC that is as vibrant as Matix itself. This talk outlines the vision of components for such an ecosystem and consolidates all the details required to efficiently build on top of MatrixRTC or add support to clients and sdks. This talk starts with a quick tour of MatrixRTC from the ground up. We start with the core specification ([MSC4143](https://github.com/matrix-org/matrix-spec-proposals/pull/4143)): what a MatrixRTC session actually is, how participants announce themselves via `m.call.member` sticky events, and how a call across a federated network of homeservers and multiple LiveKit SFUs (Selective Forwarding Unit) works. With the foundations in place, we explore what MatrixRTC makes possible beyond video calls: low-latency data channels, real-time collaborative features, game state synchronisation, and more — all authenticated by Matrix and federated by default. The second half of the talk will be a conversation about **how** to build on MatrixRTC correctly and **why** it matters. We share our learning how to structure SDKs around MatrixRTC and evaluate possible shared building blocks. The goal is to build an ecosystem with components suited for most tasks without reinventing the wheel. Attendees will gain a basic understanding of the technology so you leave the room knowing exactly where to start, and an awareness of what components are available to make your life easier and the final products stable and compatible. Let's bring MatrixRTC to the whole Matrix ecosystem. Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.2026.matrix.org/matrix-conference-2026/talk/UV3NTW/ Wed, 21 Oct 2026 14:15:00 +0200 https://cdn.media.ccc.de/events/matrix-conf/2026/webm-hd/matrix-conf-2026-101088-eng-Bringing_MatrixRTC_to_the_Matrix_Ecosystem_webm-hd.webm?1792595355 06ebf410-1392-55f9-b060-6dd68151b4a8 2026-10-21T14:15:00+02:00 Timo Kandra, Robin Townsend No UV3NTW, 2026, matrix-conf-2026, Next Gen Spec, Sofya, matrix-conf-2026-eng, matrix-conf-2026, Day 2 Element Call already proves what is possible with MatrixRTC: decentralised, federated, end-to-end encrypted video and voice calls powered entirely by the Matrix protocol — but most of the Matrix ecosystem hasn't yet adopted it. To change this we need to build an ecosystem around MatrixRTC that is as vibrant as Matix itself. This talk outlines the vision of components for such an ecosystem and consolidates all the details required to efficiently build on top of MatrixRTC or add support to clients and sdks. This talk starts with a quick tour of MatrixRTC from the ground up. We start with the core specification ([MSC4143](https://github.com/matrix-org/matrix-spec-proposals/pull/4143)): what a MatrixRTC session actually is, how participants announce themselves via `m.call.member` sticky events, and how a call across a federated network of homeservers and multiple LiveKit SFUs (Selective Forwarding Unit) works. With the foundations in place, we explore what MatrixRTC makes possible beyond video calls: low-latency data channels, real-time collaborative features, game state synchronisation, and more — all authenticated by Matrix and federated by default. The second half of the talk will be a conversation about **how** to build on MatrixRTC correctly and **why** it matters. We share our learning how to structure SDKs around MatrixRTC and evaluate possible shared building blocks. The goal is to build an ecosystem with components suited for most tasks without reinventing the wheel. Attendees will gain a basic understanding of the technology so you leave the room knowing exactly where to start, and an awareness of what components are available to make your life easier and the final products stable and compatible. Let's bring MatrixRTC to the whole Matrix ecosystem. Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.2026.matrix.org/matrix-conference-2026/talk/UV3NTW/ 00:25:00 https://media.ccc.de/v/matrix-conference-2026-103135-using-matrix-to-extend-trust-across-military-c2-infrastructure Modern military operations depend on command and control (C2) systems that can share information quickly and securely across organisational, national and network boundaries. Building and keeping trust across these environments is still one of the hardest problems in defence communications. In this session, Luke Wattan will share Labrys Technologies’ view on how Matrix can help extend trust across C2 infrastructure. He’ll cover the challenges, the opportunities, and what this could mean for secure, interoperable communications in defence. Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.2026.matrix.org/matrix-conference-2026/talk/3PYU7E/ Wed, 21 Oct 2026 14:15:00 +0200 https://cdn.media.ccc.de/events/matrix-conf/2026/webm-hd/matrix-conf-2026-103135-eng-Using_Matrix_to_extend_trust_across_military_C2_infrastructure_webm-hd.webm?1792595995 d944e8d6-587f-5f45-a96b-a80acac90887 2026-10-21T14:15:00+02:00 Luke Wattam No 3PYU7E, 2026, matrix-conf-2026, Matrix Inside, Peter, matrix-conf-2026-eng, matrix-conf-2026, Day 2 Modern military operations depend on command and control (C2) systems that can share information quickly and securely across organisational, national and network boundaries. Building and keeping trust across these environments is still one of the hardest problems in defence communications. In this session, Luke Wattan will share Labrys Technologies’ view on how Matrix can help extend trust across C2 infrastructure. He’ll cover the challenges, the opportunities, and what this could mean for secure, interoperable communications in defence. Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.2026.matrix.org/matrix-conference-2026/talk/3PYU7E/ 00:24:46 https://media.ccc.de/v/matrix-conference-2026-102388-bridging-private-federations-across-borders This talk will first present an amazing demo where someone from the Swedish Matrix public sector deployment will magically be able to talk to someone on the French one, and perhaps perhaps we will even be joined by someone from the NATO one, what an amazing time to be alive! A presentation will follow to talk about how we manage to pull this through, being on a technological or human cooperation level. Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.2026.matrix.org/matrix-conference-2026/talk/KDNVUL/ Wed, 21 Oct 2026 14:15:00 +0200 https://cdn.media.ccc.de/events/matrix-conf/2026/webm-hd/matrix-conf-2026-102388-eng-Bridging_private_federations_across_borders_webm-hd.webm?1792595708 c0b02d7e-bbe9-581b-a3f0-9420c0a4dbaa 2026-10-21T14:15:00+02:00 Mathieu Velten, Kenneth Edwall, Jeroen Franssen No KDNVUL, 2026, matrix-conf-2026, Public Sector sponsored by Element, Katherine, matrix-conf-2026-eng, matrix-conf-2026, Day 2 This talk will first present an amazing demo where someone from the Swedish Matrix public sector deployment will magically be able to talk to someone on the French one, and perhaps perhaps we will even be joined by someone from the NATO one, what an amazing time to be alive! A presentation will follow to talk about how we manage to pull this through, being on a technological or human cooperation level. Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.2026.matrix.org/matrix-conference-2026/talk/KDNVUL/ 00:14:05 https://media.ccc.de/v/matrix-conference-2026-102289-implementing-security-labels-in-matrix In some environments, governments and regulated organisations can't simply put people in a room and let them talk. What can be shared, and who can read it, is governed by a formal classification policy and by the clearances held by everyone present. This talk walks through a working implementation of security labelling in Matrix using Synapse, Element Web and Advanced Identity & Access Management. We'll cover how policies are expressed, how labels attach to rooms and messages, and how the server enforces them. We'll then finish with a live demo. In defence, government and regulated industry, "who is allowed to see this" isn't a matter of room membership - it's a label against the message itself. Users hold clearances, information carries a classification, and the system should guarantee the two are checked against each other. That expectation is a large part of why many of these organisations are still on older platforms, i.e. XMPP. - What security classifications are, why they're used and who uses them. - What are Security Policy Information Files (SPIF) and how are they used to express security classifications. - A brief look at the proto-MSC written that guided this implementation - A focused look at the work we did in Element Web to support message labels. - How we got synapse to enforce these policies, including talking to an authorisation service. - A live demo that shows all the pieces working together. **Who this is for**: anyone building Matrix for a regulated or classified environment, plus spec and client developers curious about how we approached implementing labelling in Matrix generally. Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.2026.matrix.org/matrix-conference-2026/talk/XE3K3B/ Wed, 21 Oct 2026 13:00:00 +0200 https://cdn.media.ccc.de/events/matrix-conf/2026/webm-hd/matrix-conf-2026-102289-eng-Implementing_Security_Labels_in_Matrix_webm-hd.webm?1792595331 485e60c6-d5fe-5332-b73b-da0a93c054ee 2026-10-21T13:00:00+02:00 Midhun Suresh R, Kieran Lane No XE3K3B, 2026, matrix-conf-2026, Next Gen Spec, Sofya, matrix-conf-2026-eng, matrix-conf-2026, Day 2 In some environments, governments and regulated organisations can't simply put people in a room and let them talk. What can be shared, and who can read it, is governed by a formal classification policy and by the clearances held by everyone present. This talk walks through a working implementation of security labelling in Matrix using Synapse, Element Web and Advanced Identity & Access Management. We'll cover how policies are expressed, how labels attach to rooms and messages, and how the server enforces them. We'll then finish with a live demo. In defence, government and regulated industry, "who is allowed to see this" isn't a matter of room membership - it's a label against the message itself. Users hold clearances, information carries a classification, and the system should guarantee the two are checked against each other. That expectation is a large part of why many of these organisations are still on older platforms, i.e. XMPP. - What security classifications are, why they're used and who uses them. - What are Security Policy Information Files (SPIF) and how are they used to express security classifications. - A brief look at the proto-MSC written that guided this implementation - A focused look at the work we did in Element Web to support message labels. - How we got synapse to enforce these policies, including talking to an authorisation service. - A live demo that shows all the pieces working together. **Who this is for**: anyone building Matrix for a regulated or classified environment, plus spec and client developers curious about how we approached implementing labelling in Matrix generally. Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.2026.matrix.org/matrix-conference-2026/talk/XE3K3B/ 00:27:58 https://media.ccc.de/v/matrix-conference-2026-97741-how-can-governments-collaborate-digitally-without-forcing-every-organization-onto-the-same-platform Sweden's eSam initiative(eSamverkansprogrammet) has explored Matrix as a foundation for interoperable communication across public-sector organizations. Starting with a live federation pilot between two national agencies, the work has evolved into a broader effort involving governance, security, legal frameworks, and long-term sustainability. This session discusses how Matrix can support digital sovereignty, interoperability, and vendor independence while enabling practical collaboration across organizational boundaries. Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.2026.matrix.org/matrix-conference-2026/talk/TQJAV9/ Wed, 21 Oct 2026 13:00:00 +0200 https://cdn.media.ccc.de/events/matrix-conf/2026/webm-hd/matrix-conf-2026-97741-eng-How_can_governments_collaborate_digitally_without_forcing_every_organization_onto_the_same_platform_webm-hd.webm?1792595337 02040d91-ed80-580b-b55a-51fa38b73a46 2026-10-21T13:00:00+02:00 Kenneth Edwall, Cecilia Spiik No TQJAV9, 2026, matrix-conf-2026, Public Sector sponsored by Element, Katherine, matrix-conf-2026-eng, matrix-conf-2026, Day 2 Sweden's eSam initiative(eSamverkansprogrammet) has explored Matrix as a foundation for interoperable communication across public-sector organizations. Starting with a live federation pilot between two national agencies, the work has evolved into a broader effort involving governance, security, legal frameworks, and long-term sustainability. This session discusses how Matrix can support digital sovereignty, interoperability, and vendor independence while enabling practical collaboration across organizational boundaries. Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.2026.matrix.org/matrix-conference-2026/talk/TQJAV9/ 00:23:29 https://media.ccc.de/v/matrix-conference-2026-99070-a-vision-for-a-next-generation-timeline The timeline is the most interacted-with piece of any chat software. It's where messages live! It's hard to have a chat app without one. Unfortunately, the matrix protocol has... compromises... in the timeline made for the sake of federation. From the incosistent ordering between sync and history on Synapse, to the inability to jump to pinned messages from before you joined, to the mystery of what happens when you join a room your server previously left. The good news is we have a solution! The bad news is it's gonna take a while. This talk is a rundown of every step needed to get a next-generation timeline. I'll explain stitched ordering, timeline fragments, and why we need state DAGs. Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.2026.matrix.org/matrix-conference-2026/talk/WRGTRX/ Wed, 21 Oct 2026 12:30:00 +0200 https://cdn.media.ccc.de/events/matrix-conf/2026/webm-hd/matrix-conf-2026-99070-eng-A_vision_for_a_next-generation_timeline_webm-hd.webm?1792595309 ba0b6749-9cb1-5bf4-b75e-02c270c9c901 2026-10-21T12:30:00+02:00 Jade, Ginger No WRGTRX, 2026, matrix-conf-2026, Next Gen Spec, Sofya, matrix-conf-2026-eng, matrix-conf-2026, Day 2 The timeline is the most interacted-with piece of any chat software. It's where messages live! It's hard to have a chat app without one. Unfortunately, the matrix protocol has... compromises... in the timeline made for the sake of federation. From the incosistent ordering between sync and history on Synapse, to the inability to jump to pinned messages from before you joined, to the mystery of what happens when you join a room your server previously left. The good news is we have a solution! The bad news is it's gonna take a while. This talk is a rundown of every step needed to get a next-generation timeline. I'll explain stitched ordering, timeline fragments, and why we need state DAGs. Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.2026.matrix.org/matrix-conference-2026/talk/WRGTRX/ 00:20:22 https://media.ccc.de/v/matrix-conference-2026-101186-the-adoption-gap-how-choice-and-stigma-shape-user-acceptance-of-metadata-private-messaging Tools for enabling metadata privacy - which prevents network observers from inferring who communicates with whom - have technically matured over decades. Yet, despite their maturity, these tools remain absent from today's mainstream messaging platforms. This talk looks beyond technical aspects and presents research into adoption barriers focusing on potential users themselves. It presents a study with 96 messaging app users investigating three key questions: How do users understand metadata privacy? What do they perceive as benefits and risks of metadata-private features? And under what conditions would they actually adopt metadata-private features? The results reveal (1) limited understanding of metadata privacy, (2) dual-use potential as serving both legitimate and illegitimate actors, and (3) two fundamental adoption barriers. This includes a prosocial adoption gap in which despite recognizing legitimate beneficiaries (journalists, activists, whistleblowers), the majority of users would not adopt a novel metadata-private app for the sake of others' benefit. The other adoption gap we identify is a choice stigma paradox in which the optionality of metadata-private features enables acceptance but at the same time leads to social stigma, with users worrying about appearing suspicious for choosing increased privacy. Building on these insights, I discuss what these findings mean for deploying metadata privacy in practice - including why universal defaults may succeed where optional features fail. Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.2026.matrix.org/matrix-conference-2026/talk/7TNQFM/ Wed, 21 Oct 2026 12:30:00 +0200 https://cdn.media.ccc.de/events/matrix-conf/2026/webm-hd/matrix-conf-2026-101186-eng-The_Adoption_Gap_How_Choice_and_Stigma_Shape_User_Acceptance_of_Metadata-Private_Messaging_webm-hd.webm?1792595315 e67e891b-6520-53f0-b8b1-1eb638c2268f 2026-10-21T12:30:00+02:00 Tom Biselli No 7TNQFM, 2026, matrix-conf-2026, Growing a Network, Peter, matrix-conf-2026-eng, matrix-conf-2026, Day 2 Tools for enabling metadata privacy - which prevents network observers from inferring who communicates with whom - have technically matured over decades. Yet, despite their maturity, these tools remain absent from today's mainstream messaging platforms. This talk looks beyond technical aspects and presents research into adoption barriers focusing on potential users themselves. It presents a study with 96 messaging app users investigating three key questions: How do users understand metadata privacy? What do they perceive as benefits and risks of metadata-private features? And under what conditions would they actually adopt metadata-private features? The results reveal (1) limited understanding of metadata privacy, (2) dual-use potential as serving both legitimate and illegitimate actors, and (3) two fundamental adoption barriers. This includes a prosocial adoption gap in which despite recognizing legitimate beneficiaries (journalists, activists, whistleblowers), the majority of users would not adopt a novel metadata-private app for the sake of others' benefit. The other adoption gap we identify is a choice stigma paradox in which the optionality of metadata-private features enables acceptance but at the same time leads to social stigma, with users worrying about appearing suspicious for choosing increased privacy. Building on these insights, I discuss what these findings mean for deploying metadata privacy in practice - including why universal defaults may succeed where optional features fail. Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.2026.matrix.org/matrix-conference-2026/talk/7TNQFM/ 00:25:51 https://media.ccc.de/v/matrix-conference-2026-101353-making-custom-profiles-in-matrix-more-useful An overview of the UX design and technical implementation challenges faced when implementing "live-update" support for Profile Fields in Matrix. For most of the history of Matrix, users have only been able to attach two data points to their profiles: display names and avatar URLs. This changed in August 2025 when Matrix v1.16 included support for Custom Profile Fields (specified by [MSC4133](https://github.com/matrix-org/matrix-spec-proposals/pull/4133)). But while clients could now set and get arbitrary fields, there was no mechanism for getting updates to changes in these fields. That made it unworkable to display fields in timelines or any other "live" UI elements. Profile elements could only really be shown if you specifically clicked on a user. That changed this year when Element began to work on a feature designed to communicate "statuses". They desired the ability to communicate "I'm in a meeting" or "I'm on holiday" without needing to change your display name (and polluting every other room you're in with membership updates). This short talk from Andrew and Aaron at Element details the history, UX design, controversies and technical scalability constraints of designing a live-updating system for profile fields across Matrix. Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.2026.matrix.org/matrix-conference-2026/talk/QD377V/ Wed, 21 Oct 2026 12:00:00 +0200 https://cdn.media.ccc.de/events/matrix-conf/2026/webm-hd/matrix-conf-2026-101353-eng-Making_Custom_Profiles_in_Matrix_More_Useful_webm-hd.webm?1792595282 5ea1206c-52ba-5aa0-a2d1-9f0b2317bf19 2026-10-21T12:00:00+02:00 Andrew Morgan (anoa), Aaron Thornburgh No QD377V, 2026, matrix-conf-2026, Next Gen Spec, Sofya, matrix-conf-2026-eng, matrix-conf-2026, Day 2 An overview of the UX design and technical implementation challenges faced when implementing "live-update" support for Profile Fields in Matrix. For most of the history of Matrix, users have only been able to attach two data points to their profiles: display names and avatar URLs. This changed in August 2025 when Matrix v1.16 included support for Custom Profile Fields (specified by [MSC4133](https://github.com/matrix-org/matrix-spec-proposals/pull/4133)). But while clients could now set and get arbitrary fields, there was no mechanism for getting updates to changes in these fields. That made it unworkable to display fields in timelines or any other "live" UI elements. Profile elements could only really be shown if you specifically clicked on a user. That changed this year when Element began to work on a feature designed to communicate "statuses". They desired the ability to communicate "I'm in a meeting" or "I'm on holiday" without needing to change your display name (and polluting every other room you're in with membership updates). This short talk from Andrew and Aaron at Element details the history, UX design, controversies and technical scalability constraints of designing a live-updating system for profile fields across Matrix. Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.2026.matrix.org/matrix-conference-2026/talk/QD377V/ 00:27:46 https://media.ccc.de/v/matrix-conference-2026-102416-building-a-safer-network-together Join **Jim** from the Matrix.org Foundation Trust & Safety team, as he walks through the progress the ecosystem has made in building a safer network, and invites you to join us in building the future of safety on Matrix. Jim is joined by special guest **Juliet** from [ROOST](https://roost.tools), and you'll hear about their tools **Coop** and **Osprey**. We'll talk about how matrix.org is using those tools, and how we're making them more accessible for Matrix servers. Jim will also talk about **Reporting v2**, a flagship project for the Foundation Safety team, and **how you can help**. Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.2026.matrix.org/matrix-conference-2026/talk/NBMLXD/ Wed, 21 Oct 2026 12:00:00 +0200 https://cdn.media.ccc.de/events/matrix-conf/2026/webm-hd/matrix-conf-2026-102416-eng-Building_a_safer_network_together_webm-hd.webm?1792595256 1238f7ed-89d9-5f5a-a931-1f106db17d5b 2026-10-21T12:00:00+02:00 Jim Mackenzie, Juliet (she/her) No NBMLXD, 2026, matrix-conf-2026, Growing a Network, Peter, matrix-conf-2026-eng, matrix-conf-2026, Day 2 Join **Jim** from the Matrix.org Foundation Trust & Safety team, as he walks through the progress the ecosystem has made in building a safer network, and invites you to join us in building the future of safety on Matrix. Jim is joined by special guest **Juliet** from [ROOST](https://roost.tools), and you'll hear about their tools **Coop** and **Osprey**. We'll talk about how matrix.org is using those tools, and how we're making them more accessible for Matrix servers. Jim will also talk about **Reporting v2**, a flagship project for the Foundation Safety team, and **how you can help**. Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.2026.matrix.org/matrix-conference-2026/talk/NBMLXD/ 00:26:18 https://media.ccc.de/v/matrix-conference-2026-100965-matrix-in-public-sector-panel-discussion This panel discussion will gather several public sector organisations who have deployed Matrix at scale to discuss about the relevance of Matrix in public sector, the importance of cross-border collaboration / cross-border interoperability, supporting the ecosystem (and challenges thereof) and benefits of using Matrix over proprietary solutions. Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.2026.matrix.org/matrix-conference-2026/talk/VZQLU3/ Wed, 21 Oct 2026 12:00:00 +0200 https://cdn.media.ccc.de/events/matrix-conf/2026/webm-hd/matrix-conf-2026-100965-eng-Matrix_in_Public_Sector_-_Panel_Discussion_webm-hd.webm?1792595272 3757cce5-4039-5fb9-b917-d2b8a0df1289 2026-10-21T12:00:00+02:00 Marco Holz, Patrick Weber, Kenneth Edwall, Amandine Le Pape, Mathieu Velten No VZQLU3, 2026, matrix-conf-2026, Public Sector sponsored by Element, Katherine, matrix-conf-2026-eng, matrix-conf-2026, Day 2 This panel discussion will gather several public sector organisations who have deployed Matrix at scale to discuss about the relevance of Matrix in public sector, the importance of cross-border collaboration / cross-border interoperability, supporting the ecosystem (and challenges thereof) and benefits of using Matrix over proprietary solutions. Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.2026.matrix.org/matrix-conference-2026/talk/VZQLU3/ 00:54:58 https://media.ccc.de/v/matrix-conference-2026-106034-introduction-to-custodial-janitorial-moderation-and-why-you-are-already-doing-it A introduction to custodial / janitorial moderation and how you are already using this model, potentially without knowing it. In this talk i will present the basics of the custodial / janitorial moderation model and the role split and go into why your already using this model potentially not knowing it and describing what the roles do in a safe manner. While the subject matter of janitorial moderation can become very content warning heavy very quickly this talk will stay away from this by having a here be dragons type of policy around this by only saying things go bump in the night and leaving defining that as a exercise for the audience. Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.2026.matrix.org/matrix-conference-2026/talk/D9Y33R/ Wed, 21 Oct 2026 11:44:00 +0200 https://cdn.media.ccc.de/events/matrix-conf/2026/webm-hd/matrix-conf-2026-106034-eng-Introduction_to_custodial_janitorial_moderation_and_why_you_are_already_doing_it_webm-hd.webm?1792595246 51abc285-d432-5ba5-8952-448f641f9bf6 2026-10-21T11:44:00+02:00 Cat No D9Y33R, 2026, matrix-conf-2026, Lightning Talks, Peter, matrix-conf-2026-eng, matrix-conf-2026, Day 2 A introduction to custodial / janitorial moderation and how you are already using this model, potentially without knowing it. In this talk i will present the basics of the custodial / janitorial moderation model and the role split and go into why your already using this model potentially not knowing it and describing what the roles do in a safe manner. While the subject matter of janitorial moderation can become very content warning heavy very quickly this talk will stay away from this by having a here be dragons type of policy around this by only saying things go bump in the night and leaving defining that as a exercise for the audience. Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.2026.matrix.org/matrix-conference-2026/talk/D9Y33R/ 00:09:34 https://media.ccc.de/v/matrix-conference-2026-101394-opening Welcome to The Matrix Conference 2026! Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.2026.matrix.org/matrix-conference-2026/talk/N9AQGY/ Wed, 21 Oct 2026 10:00:00 +0200 https://cdn.media.ccc.de/events/matrix-conf/2026/webm-hd/matrix-conf-2026-101394-eng-Opening_webm-hd.webm?1792595221 dd7bdf1c-ae49-5809-b808-d8cd308b99e2 2026-10-21T10:00:00+02:00 Andy Piper No N9AQGY, 2026, matrix-conf-2026, Keynote, Sofya, matrix-conf-2026-eng, matrix-conf-2026, Day 2 Welcome to The Matrix Conference 2026! Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.2026.matrix.org/matrix-conference-2026/talk/N9AQGY/ 00:10:04 https://media.ccc.de/v/matrix-conference-2026-102392-open-protocols-unite-common-goals-in-advocating Can open protocols communities learn from each other? For sure! I would like to talk about political demands from a perspective of advocating for open protocols based social networks in EUrope. And why I build the alliance “Open networks and public spheres”. I would like to learn about your political demands as the Matrix community and what common struggles are that ActivityPub or atproto communities share with you? This talks wants to build bridges within our habitat of open protocols communities. When advocating for open protocols as relevant tools for so called "digital sovereignty" (that is not for states and their administrations or for purely economical interests but from a digital commons perspective that benefits all) it seems important to build networks - so we can get to know our policies goals and see if we have joined political demands therefore. Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.2026.matrix.org/matrix-conference-2026/talk/PYSDEF/ Wed, 21 Oct 2026 11:30:00 +0200 https://cdn.media.ccc.de/events/matrix-conf/2026/webm-hd/matrix-conf-2026-102392-eng-Open_protocols_unite_Common_goals_in_advocating_webm-hd.webm?1792595225 a7355c25-85ca-579b-9aa9-1da3bb7ae895 2026-10-21T11:30:00+02:00 samvie No PYSDEF, 2026, matrix-conf-2026, Lightning Talks, Peter, matrix-conf-2026-eng, matrix-conf-2026, Day 2 Can open protocols communities learn from each other? For sure! I would like to talk about political demands from a perspective of advocating for open protocols based social networks in EUrope. And why I build the alliance “Open networks and public spheres”. I would like to learn about your political demands as the Matrix community and what common struggles are that ActivityPub or atproto communities share with you? This talks wants to build bridges within our habitat of open protocols communities. When advocating for open protocols as relevant tools for so called "digital sovereignty" (that is not for states and their administrations or for purely economical interests but from a digital commons perspective that benefits all) it seems important to build networks - so we can get to know our policies goals and see if we have joined political demands therefore. Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.2026.matrix.org/matrix-conference-2026/talk/PYSDEF/ 00:10:40 media.ccc.de / RSS 0.3.3 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 matrix-conf-2026 as webm