NIP-92: Rendezvous Beacons (draft; https://github.com/nostr-protocol/nips/pull/333 ) enables anonymous establishment of communication between two parties, addressing the issue of receiving messages from unknown contacts.
A shared secret is derived using ECDH like in NIP-04, but this shared secret is only used through *tagged hashes*, with a different tag (not to be confused with nostr tags) for each purpose.
From the shared secret, a *rendezvous keypair* is established, where the sender knows the private key and the recipient knows the public key. This is done by tweaking the sender's key (an ephemeral key in the case of NIP-92) using a tweak value derived from the shared secret.
shafemtol /
npub1mh…anahj
2023-06-04 19:32:09
in reply to nevent1q…8utl
Author Public Key
npub1mh94j7j7nwvzl7kwcg70fhxe67kdy50fccakmueq9jjf77zmc25svanahjPublished at
2023-06-04 19:32:09Event JSON
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"pubkey": "ddcb597a5e9b982ffacec23cf4dcd9d7acd251e9c63b6df3202ca49f785bc2a9",
"created_at": 1685899929,
"kind": 1,
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"content": "NIP-92: Rendezvous Beacons (draft; https://github.com/nostr-protocol/nips/pull/333 ) enables anonymous establishment of communication between two parties, addressing the issue of receiving messages from unknown contacts.\n\nA shared secret is derived using ECDH like in NIP-04, but this shared secret is only used through *tagged hashes*, with a different tag (not to be confused with nostr tags) for each purpose.\n\nFrom the shared secret, a *rendezvous keypair* is established, where the sender knows the private key and the recipient knows the public key. This is done by tweaking the sender's key (an ephemeral key in the case of NIP-92) using a tweak value derived from the shared secret.",
"sig": "6f48f099a0e782c6503601c5c782f241b99c42c37a72f0abdf8fd92f55c791ff8b7a0661d73a21727aa530bfc87f123acbc64ab87b795636a2b284bb1679d4b1"
}