Evan Prodromou

2025-10-31 17:16:56

FOSDEM 2026 – Social Web Devroom – Call For Participation

The Social Web Foundation is pleased to announce the Social Web Devroom at FOSDEM 2026, and invite participants to submit proposals for talks for the event.

FOSDEM is an exciting free and open source software event in Brussels, Belgium that brings together thousands of enthusiasts from around the world. The event spans the weekend of January 31 to February 1, 2026 and features discussion tracks (“devrooms”) for scores of different technology topics.

The Social Web Devroom will take place on Saturday, January 31.

Format

There will be three available talk formats:

• 50 minutes – for bigger projects, followed by 10 minutes of questions.
• 25 minutes – for bigger projects, followed by 5 minutes of questions.
• 8 minutes – micro-talks on smaller or newer projects, in groups of 3, followed by 6 minutes of combined questions for the group.

Topics

The Social Web Devroom is open to talks all about the Social Web AKA the Fediverse, including:

• Implementations of the ActivityPub protocol or ActivityPub API
• Clients for ActivityPub-enabled software like Mastodon
• Supporting services for the Fediverse, like search or onboarding
• ActivityPub-related libraries, toolkits, and frameworks
• Tools, bots, platforms, and related topics
• Advocacy, organization and social activity in deploying Open Source ActivityPub applications

Important dates

• Submission open: 1 Nov 2025
• Submission deadline: 1 Dec 2025
• Acceptance notifications: 10 Dec 2025
• Final schedule announcement: 15 Dec 2025
• Devroom: 31 Jan 2026

Submissions

Submit talk proposals to https://pretalx.fosdem.org/fosdem-2026/cfp. Select “Social Web” from the “Track” dropdown, and include the length of your talk (8/25/50) in the submission notes. (Note that the “Lightning Talks” track is a separate event-wide track; if you’re proposing a Social Web micro-talk, please choose the “Social Web” track!)

Code of Conduct

All attendees and speakers must be familiar with and agree to the FOSDEM Code of Conduct.

Contact

Questions about topics, formats, or the Social Web in general should go to contact@socialwebfoundation.org.

Social Web Foundation

Towards a bigger, better fediverse

^{Social Web Foundation}

Evan Prodromou

2025-12-19 17:07:33

Implementing Encrypted Messaging over ActivityPub

One of the project areas of the Social Web Foundation for the last year has been end-to-end encrypted messaging. ActivityPub, the standard protocol that powers the Social Web, has privacy controls, but they do not protect the content of messages from server operators. Encrypted messaging has become a standard feature on most social networks since ActivityPub was created, and its lack has inhibited Social Web adoption and public trust in the network.

ActivityPub is extensible, though. As part of our E2EE program, Mallory, Tom and I adapted the Messaging Layer Security (MLS) standard as an extension of ActivityPub to make the MLS over ActivityPub specification. The protocol fits the great MLS E2EE system onto the ActivityPub API and federation protocol.

But a protocol specification is not enough; it must be implemented. That’s why we’re so happy to announce that the Sovereign Tech Fund has commissioned work with the Social Web Foundation to coordinate two new interoperable implementations of MLS over ActivityPub. This investment by the Sovereign Tech Fund will help move the Fediverse towards more privacy for social web users, no matter what server they use.

We decided to partner with two different projects in order to make sure that we’re making an open standard that can work between implementations. With two implementers, we’ll need to communicate clearly about architectural and implementation decisions, and make sure that those decisions end up in the final version of the spec — not in a TODO comment in the source code of a single project.

The first project is Emissary, the great social web application platform behind projects like Atlas and Bandwagon. Ben Pate, Emissary founder, says, “The Emissary Project is deeply committed to the Fediverse, where we are building a free and trustworthy Internet for all 8 billion humans. Delivering on that promise, Emissary is excited to team up with the Social Web Foundation to bring End-to-End-Encryption (E2EE) to the Fediverse. We are eternally grateful for the SWF’s leadership and support, without which this project could not have happened. Our work is already underway, and in 2026 anyone will be able to build E2EE applications on the Emissary platform.”

The second project is Bonfire. Bonfire is a modular framework for building federated apps, with its first app (Bonfire Social) offering a social networking experience enhanced with tools for privacy, trust, and collaboration (such as circles and boundaries).

The maintainers of Bonfire, Ivan Minutillo and Mayel de Borniol, said: “We think that end-to-end encryption should simply be the default for any private communication online. Working with the Social Web Foundation to bring E2EE to ActivityPub marks a crucial step in fostering privacy and trust, and especially in enabling the fediverse to become a safe space for activists and communities to organise, coordinate, and collaborate meaningfully. By making secure, user-friendly messaging a core part of the fediverse, we’re helping lay the groundwork for decentralised networks where people can go beyond talking in the mythical ‘global town square’ and actually organise and accomplish things together.”

This work will happen best if the Fediverse community tracks it closely. We’ll be making updates here on the SWF blog as progress continues. Developers and active users may also be interested in the ActivityPub E2EE Messaging Task Force at the W3C, where the specification is being developed into a report for the Social Web Community group. Finally, we’ll be using the #JustBetweenUs hashtag to share progress and ideas, so you can follow it to see what’s been happening.

End-to-end Encryption (E2EE) over ActivityPub

Encrypted direct messages supply the confidence that people need to connect with family, friends and colleagues privately over a social network. As part of the Summer of Protocols 2024, we explore …

^{Social Web Foundation}