I believe these things require a semi-trusted central coordinator.
It would probably work on a NIP-29 group setting since you're already relying on a relay there, but I don't know.
Listening to nostr:npub1az9xj85cmxv8e9j9y80lvqp97crsqdu2fpu3srwthd99qfu9qsgstam8y8 talk about the Off The Record protocol for the umpteenth time on the Bitcoin Review podcast.
Is anyone working on bringing this to Nostr? Anything make it fundamentally impossible? DH key exchange?
nostr:npub1jlrs53pkdfjnts29kveljul2sm0actt6n8dxrrzqcersttvcuv3qdjynqn nostr:npub1l2vyh47mk2p0qlsku7hg0vn29faehy9hy34ygaclpn66ukqp3afqutajft nostr:npub180cvv07tjdrrgpa0j7j7tmnyl2yr6yr7l8j4s3evf6u64th6gkwsyjh6w6 any of you know?
Discussion
No need for centralized authority. Adium did it for IRC DMs with OTR.
You just share ephemeral keys, it's local client based. Servers only help if you want to share the keys with a different client. But some galaxy brain can probably figure out how to do that using Nostr itself.