That’s the only way. I don’t think there’s any other solution that would allow for you being able to be sure that the instance you are on doesn’t have a way to acess your data - any other e2e encryption integrated into Lemmy UI would not and cannot be reliable, because an admin can just rewrite the code as he sees fit.
Only solution to this is to just encrypt the message manually before it touches anything Lemmy UI.
Possible doesn’t mean easily doable, unfortunately. Technically speaking, I don’t know how hard it would be for the fediverse. I get the sense that overall it’s been a mismanaged aspect of the ecosystem for a long time.
It touches on a broader issue of to what extent the software ecosystem enables users to exist on the fediverse at large as a single user or through a single interface. At the moment, it’s basically not really a thing. Arguably, if the fediverse wants to make any claim to being an actual “federated universe” rather than just separate FOSS decentralised platforms (there is a big difference IMO) … then it should definitely be a thing.
In relation to DMs, then, in a “true fediverse” the answer would be simply something like integrating matrix into your interface such that you and I could easily start a space on matrix and start chatting there if we wanted to.
I’ve come to the conclusion that for this to happen it needs to happen at the UI/client/app level. In fact, I wouldn’t be surprised if that happens in not too long a time. An app that understand and works well with all of the major platforms and gives you a single and well designed interface for working with all of them from a single space. This way the platform developers can focus on their specific funcionality and backend while the app/client developers can focus on the UI and the challenge of bringing things together. I see it as similar to the way we all have email apps that easily bring together multiple email clients.
oddly enough i presumed this was how mastodon did DMs, i hope they can get E2E in the apps ASAP