I made this relay: https://lockbox.fiatjaf.com/
Anything you publish there will only be shown to people you follow (they have to perform AUTH before reading).
If you add it to your NIP-65 list of "write" relays then all clients that do outbox should automatically start showing those posts to the people that follow you that you also follow right away.
To publish there you must include the "-" tag (NIP-70), which means others can't take your post and automatically republish it elsewhere because other relays won't accept the post unless it is published by your own hands (with AUTH).
The "-" is supported in most relays, but obviously any relay can decide to not support it and spread content against the will of the publisher, so do not use it for anything really private unless you trust all the people you follow to not rebroadcast your stuff.
Because no client supports publishing with a "-" tag currently I placed a simple form there on the landing page that will do that arduous task of adding a "-" to the event before publishing it.
Also it uses your follow list by default for deciding who can read your notes, but if you want to do a custom list you can easily achieve that by publishing a custom kind:3 follow list to Lockbox specifically (using a "-" tag so it won't get spreaded to other relays) and then Lockbox will read from that custom list.
Three whole characters. Wait, no 6! ["-"], Ardouos indeed, that landing page is a trooper!
I would know which one of those people I follow broke the trust, correct?
No, you wouldn't.
Well, if the note shows up on a relay that implements NIP-70 then you know you're the one who broke your own trust (or your client, without you knowing it).
There is a way to know who broke the trust: you have to sign a different event for each person that comes asking the relay for the content, just adding their pubkey in a tag, for example. It's kinda ugly but should work great. The problem is that it requires the relay to be able to sign notes on your behalf, which is doable with NIP-46 bunkers.
Once you know who pirated your content you should be able to kick that person out of your selected whitelist if that's your goal.
