From: pyth <pyth@pythcoiner.dev>
To: Sean Carlin <seancarlin90@googlemail.com>,
Bitcoin Development Mailing List <bitcoindev@googlegroups.com>
Subject: Re: [bitcoindev] [BIP Draft] Blind Relay: Stateless Encrypted WebSocket Coordination for PSBTs
Date: Thu, 26 Mar 2026 01:15:33 +0100 [thread overview]
Message-ID: <fede50f58f286763106ba143e7530990eb7d86c1.camel@pythcoiner.dev> (raw)
In-Reply-To: <3f1a1491-06e1-4453-9538-fa66bc432a06n@googlegroups.com>
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Hi Sean, this is interesting, but note that bitcoin core doesn't have
dependencies for AES-GCM-256, while it have dependencies for CHACHA20-
POLY1305.
Best,
Pyth
On Wed, 2026-03-25 at 05:00 -0700, 'Sean Carlin' via Bitcoin
Development Mailing List wrote:
> Hi everyone,
>
> I'd like to propose a new BIP for real-time, trust-minimized
> coordination of multi-signature PSBTs.
>
> The Problem
> Coordinating N-of-M Bitcoin transactions currently forces users into
> a binary choice:
> - Manual out-of-band transfers (USB drives, secure messengers) that
> preserve privacy but introduce high friction and error risk, or
> - Stateful coordination servers that offer good UX but act as privacy
> honeypots, logging metadata, signer relationships, and often storing
> PSBTs on disk.
>
> The Proposal: Blind Relay
> This BIP introduces a "Blind Relay" - an ephemeral, stateless, zero-
> knowledge WebSocket relay. All payloads are encrypted client-side
> with AES-GCM-256, with decryption keys held exclusively in client-
> side URL fragments (never sent to the server). The relay operates
> entirely in RAM with a strict 24-hour TTL and self-destructs upon
> completion, providing real-time coordination without persistent
> metadata or disk storage.
>
> A reference implementation has been running in production for three
> months, successfully facilitating real multisig ceremonies.
>
> Links
> - BIP Draft:
> https://github.com/scarlin90/bip-stateless-psbt-coordination/blob/main/bip-draft.md
> - Source Code: https://github.com/scarlin90/signingroom
> - Live Client: https://signingroom.io
> - Related Research Paper: https://arxiv.org/abs/2601.17875
>
> I look forward to your technical feedback - especially on the
> specification, security model, edge cases, and any suggested
> improvements.
>
> Best regards,
> Sean Carlin
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next prev parent reply other threads:[~2026-03-26 14:21 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-25 12:00 'Sean Carlin' via Bitcoin Development Mailing List
2026-03-26 0:15 ` pyth [this message]
2026-03-26 16:19 ` 'Sean Carlin' via Bitcoin Development Mailing List
2026-03-26 14:02 ` [bitcoindev] " Thomas Suau
2026-03-26 16:02 ` 'Sean Carlin' via Bitcoin Development Mailing List
2026-04-03 11:03 ` 'Sean Carlin' via Bitcoin Development Mailing List
2026-04-06 20:12 ` STEVEN SLATER
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