Re:One week of Libera Chat
by ptman on Wednesday May 26, 2021 @10:51AM
(#27291215)
There are no hard limit on matrix room member counts. e2e encrypted rooms with thousands of users se a lot of key negotiation traffic, but with such sizes maybe full encryption doesn't buy much as any user can share the log/history.
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Umm, so O(n^2) key exchange traffic? In practice, is it noticable to users/ server admins?
O(N) per user for the initial key exchange when you join a room, and then O(1) thereafter - although you should re-key when someone joins/leaves or every N messages or X days (where N is typically 100 and X is typically 7).