I made a draft of an "encrypted public messenger", which was basically a Feed for an address derivate from the public ket, let's say 'abcd..eaea'

Anyone could check, "are there any messages for my address?" and you get a whole list of timestamps and encrypted stuff.

Inside the encrypted message is a signature from the sender. That way you 'could' block spam.

Only the owner of the private key could see who sent what, and so...

And even with that my concussion was that users expectations for a private IM might be far away from my experiment.

here are a few ideas you might take into consideration when designing a secure IM https://developer.virgilsecurity.com/docs/e3kit/fundamentals/secure-instant-messaging/

Obviously if you've worked on something similar, you already know it, he