this post was submitted on 21 Dec 2022
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> As new users set up their accounts and start using Mastodon, they realize that some things work differently than on Twitter ... DMs are complicated, and there are concerns about their security.
Isn't the security model for Mastodon DMs the same as Twitter?
@theking Not really. A DM between users on different servers is exposed to multiple instance operators. @fediverse
@arkiuat
So like the same as email or SMS?
@fediverse
@theking I‘ve only just begun to study the detailed ActivityPub spec, and I haven’t read the DM part yet. @fediverse
Its exposed to the admins of instances where the involved users are registered. For example if
@sally@mastodon.socialsends a dm to@nelly@example.com, only the admins of mastodon.social and example.com can access it.