this post was submitted on 25 Feb 2026
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Important progress has been made regarding bringing MLS end-to-end encryption to the ActivityPub protocol, with developers already building implementations and providing feedback to a future version of the protocol spec.

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[–] ageedizzle@piefed.ca 15 points 19 hours ago (2 children)

Matrix is not really integrated into the ActivityPub protocol the same way DMs usually are. I would have to open a separate application to message you on Matrix, I can’t just click on your profile and shoot you a DM (or can I?).

[–] knova@infosec.pub 6 points 19 hours ago (2 children)

You cannot, two totally different protocols

[–] ageedizzle@piefed.ca 7 points 19 hours ago

There you go. So I think adding DMs to ActivityPub would add an extra level of convenience 

[–] Zagorath@aussie.zone 2 points 17 hours ago (1 children)

I mean, there's nothing technically stopping one app supporting both protocols natively, especially since Lemmy already includes a field for people's profiles to link their Matrix ID. Though to my knowledge none do it yet.

[–] knova@infosec.pub 1 points 8 hours ago

Sure, in the same way there is nothing stopping Lemmy from using ATProto. The problem is all competing standards and what the developer chooses to use.

[–] Steve@communick.news -3 points 18 hours ago

ActivityPub is only one of a number of federated protocols.
One notably unsuited to instant messaging.