Reminder (or maybe eye-opener) to Mastodon users:
Direct Messages on Mastodon are NOT encrypted.
What does this mean: The message is in the database un-encrypted. Anyone with access to the database could potentially read the messages.
For mastodon.world, only the admins have database access (@jeroen, @spaceriker and myself).
If you have really sensitive info, don't share it on Mastodon. There are secure messaging apps for that.