E2E encrypted chats and their disadvantages:
- Matrix: Meta-data (room topics/members, ...) + reactions not encrypted/authenticated. Security protocol has a bunch of disadvantages. Hard to use for non-techies.
- XMPP + OMEMO: Even harder to use for non-techies. No history on new devices. MUC members not encrypted/authenticated (afaik). MUCs don't scale well.
- XMPP + OTR: Like above, but no support for MUCs and no offline messages.
- XMPP + PGP: Like above, but similar security disadvantages to Matrix (replay attacks, ...)
- Signal: Centralised service on GCP (Google can see connection meta data). Group chats don't scale well. Only useable with a phone number.
- Whatsapp: Centralised service by Meta with a bad track record for security. Group chats don't scale well (same protocol as Signal). Provider can apparently access messages somehow. Only useable with phone number.
- Telegram: Also centralised. Normal chats and group chats not e2e encrypted at all. Secret chats use custom unverified protocol.
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Sigma (sigmasternchen@comfy.social)'s status on Sunday, 21-Jan-2024 01:18:14 JST Sigma