From: Thomas Suau <tomeclair@gmail.com>
To: Bitcoin Development Mailing List <bitcoindev@googlegroups.com>
Subject: [bitcoindev] Re: [BIP Draft] Blind Relay: Stateless Encrypted WebSocket Coordination for PSBTs
Date: Thu, 26 Mar 2026 07:02:45 -0700 (PDT) [thread overview]
Message-ID: <cb192fdb-e26e-463f-97be-fbb627ce84adn@googlegroups.com> (raw)
In-Reply-To: <3f1a1491-06e1-4453-9538-fa66bc432a06n@googlegroups.com>
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Hello,
The transport layer problem is well addressed here. The complementary piece
— ensuring signers can independently validate transaction invariants before
signing, regardless of how the PSBT was relayed — is what I've been
exploring with BTSL:
https://delvingbitcoin.org/t/btsl-bitcoin-transaction-schema-language-a-declarative-validation-schema-for-psbt-workflows/2338
Best regards,
Thomas Suau
Le mercredi 25 mars 2026 à 13:21:39 UTC+1, Sean Carlin a écrit :
> 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: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-25 12:00 [bitcoindev] " 'Sean Carlin' via Bitcoin Development Mailing List
2026-03-26 0:15 ` pyth
2026-03-26 16:19 ` 'Sean Carlin' via Bitcoin Development Mailing List
2026-03-26 14:02 ` Thomas Suau [this message]
2026-03-26 16:02 ` [bitcoindev] " 'Sean Carlin' via Bitcoin Development Mailing List
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