Hello,
I am an administrator of a Discourse forum, and I have been asked whether it is possible to enable encryption for private messages. I noticed that the Discourse Encrypt plugin is obsolete. Is there a solution available?
Thank you very much for your help. 
The closest option right now is the site setting mentioned in this topic, which prevents admins from reading PMs by clicking a link in the interface. But of course, that is not the same as encryption. The messages can still be accessed by disabling the setting or by reading them in the database, for example, with Data Explorer.
There is a reason why Discourse calls them personal messages instead of private messages.
Thank you very much for your reply.
I believe it is this one:
Just to make sure I understand correctly: if I enable this and then create a private category, will I no longer see it in “All categories” and therefore be unable to modify its settings, unless I disable this option?
Thank you very much.