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Trust worthy Linux instant messaging app ? (lemmy.ml)

submitted 4 years ago* (last edited 4 years ago) by [email protected] to c/[email protected]

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Looking for instant messaging app for chatting with people, video call would be nice too.

Preferably no telephone number needed to add contacts.

Also should be available on Debian and F-Droid main repository, because I feel unease having to trust on additional repositories, flathub etc third party stuff.

Thanks

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[–] [email protected] 1 points 4 years ago

Personally, I just opt for Matrix/Element due to the familiarity of the implementation used for encrypting the conversation. It rely on JItsi for video/audio calls however, so there's that. Matrix is self-hostable since you can run synaptic server locally. As far as confidentiality goes, if you teach the people to regularly swap out encryption keys on a yearly basis on both sides, the chat log would forever be encrypted and "lost" to time, because the key required to decrypt those are being overwritten by new key.

[–] [email protected] 1 points 4 years ago* (last edited 4 years ago)

The real question would be self-hosted? Because if not, well... lots of trust to be given to a 3rd party then...

Anyways, if self-hosted definitely XMPP (Clients: Fdroid: Conversations, Debian: Dino or Gajim). You can try it with a free server , but self-hosting is easy. Both Dino and Conversations support e2e encryption so even with a free host you are relatively secure, but metadata will still leak. Conversations also supports 1:1 video-chat, with that feature AFAIK soon coming to Dino (edit: maybe not so soon, but Gajim supports it).

Another XMPP based option would be Movim. It runs in a browser or via the Android client on Fdroid. Their main instance is free to use, but all communication is in clear-text (Edit: SSL transport encrypted of course). It also supports 1:1 video chats including with people on Conversations. Self-hosting it is a bit more involved, but definitely doable.

Non XMPP options would be matrix.org / element. But I can't recommend them for self-hosting and there is no real audio-video chat (it just embeds an external instance of jitsi-meet, which ironically is XMPP based).