this post was submitted on 20 Sep 2024
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10% of what? keys are regularly rotated, per-member, and it would soon cost a lot of storage to store historical keys for very large rooms (by their member count)
Sounds like a design flaw. How does this work with other messengers that don't allow users to send unencrypted messages, like Wire, Signal, and WhatsApp?
(part 2) it doesn't seem that signal has such a limit. maybe they're just fine with using relatively a large part of their data for key storage
probably the same way, and probably with an upper limit on group chat member count
Groups have an encryption key that I guess you receive from other members upon joining.