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Wed, 05 Aug 2026 17:43:01 -0700 (PDT) X-Received: by 2002:a05:6808:4fcb:b0:4ae:f5be:fe30 with SMTP id 5614622812f47-4afae1ac37amr7031552b6e.18.1785976981212; Wed, 05 Aug 2026 17:43:01 -0700 (PDT) Received: by 2002:a05:690c:9a11:b0:81e:11b4:1172 with SMTP id 00721157ae682-82112542592ms7b3; Wed, 5 Aug 2026 17:41:45 -0700 (PDT) X-Received: by 2002:a05:690c:6912:b0:820:b01:9c0 with SMTP id 00721157ae682-820229c72d3mr63418767b3.34.1785976904220; Wed, 05 Aug 2026 17:41:44 -0700 (PDT) Date: Wed, 5 Aug 2026 17:41:43 -0700 (PDT) From: Shannon Appelcline To: Bitcoin Development Mailing List Message-Id: <215e626f-972d-493e-97de-b43259c8403bn@googlegroups.com> In-Reply-To: <76b22b7a-cc05-4d5d-8664-84f8c916e3ccn@googlegroups.com> References: <76b22b7a-cc05-4d5d-8664-84f8c916e3ccn@googlegroups.com> Subject: =?UTF-8?Q?=5Bbitcoindev=5D_Re=3A_Bitcoin_Resilience_Presentations_?= =?UTF-8?Q?=E2=80=94_August_5?= MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="----=_Part_1370630_921685446.1785976903806" X-Original-Sender: Shannon.Appelcline@gmail.com Precedence: list Mailing-list: list bitcoindev@googlegroups.com; contact bitcoindev+owners@googlegroups.com List-ID: X-Google-Group-Id: 786775582512 List-Post: , List-Help: , List-Archive: , List-Unsubscribe: , X-Spam-Score: -0.5 (/) ------=_Part_1370630_921685446.1785976903806 Content-Type: multipart/alternative; boundary="----=_Part_1370631_1721100788.1785976903806" ------=_Part_1370631_1721100788.1785976903806 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hey Folks, We held our meeting today about Bitcoin interoperability & resilience.=20 We've got all the records of the meeting including the full meeting video= =20 and slides here: https://developer.blockchaincommons.com/meetings/2026-08-resilience/ I presented specifically on Bitcoin Core, showing off some tools (and a=20 technique) for extracting a descriptor or master private key from Bitcoin= =20 Core so that you can better preserve it using Shamir's Secret Sharing.=20 https://www.youtube.com/watch?v=3DckUwWCFqua8 We also had a presentation from Stan Reeves on Keylay, a technology he's=20 putting together to make multisigs easier by allowing the clean=20 transmission of QRs and Animated QRs through a secure communication system.= =20 That video is here: https://www.youtube.com/watch?v=3DoAsxoo3Rqn4 Shannon On Tuesday, August 4, 2026 at 10:03:31=E2=80=AFAM UTC-10 Shannon Appelcline= wrote: > Hey Folks, > > Just a reminder that this presentation is tomorrow: > > > WHAT? Securing Your Bitcoin with Entropy, Seeds, Shards, Airgaps, and Mor= e > WHEN? August 5th, 10am PT > WHERE?=20 > https://us02web.zoom.us/j/88143195571?pwd=3DrgVeDCgOKT3IMtBiISego4p5wK0s6= F.1 > > The Coldcard seed-creation failure revealed over the weekend definitely= =20 > showed off one of the many ways that self-sovereign controlled funds can = be=20 > vulnerable. Some of the techniques that I plan to talk about tomorrow hel= p=20 > you to control the fallout of that sort of failure by maintaining good=20 > metadata that records where a seed or key originated from. > > Hope to see you there. > > Shannon > > On Thursday, July 30, 2026 at 1:40:45=E2=80=AFPM UTC-10 Shannon Appelclin= e wrote: > >> Next Wednesday, August 5th at 10am PT, Blockchain Commons will host a=20 >> Bitcoin-focused Gordian Developers Meeting about improving the protectio= n=20 >> of your secrets. >> >> The general goal is to demonstrate how you can ensure the resilience of= =20 >> your Bitcoin Core=E2=80=93stored assets by integrating Bitcoin Core into= the wider=20 >> Bitcoin ecosystem.=20 >> >> We will demonstrate how to: >> * Export descriptors from Bitcoin Core. >> * Export extended private keys from Bitcoin Core. >> * Use Shamir's Secret Sharing & metadata to store & protect that exporte= d=20 >> data. >> >> Also: >> * Create a BIP-39 secret remotely. >> * Shard that secret. >> * Import descriptors derived from the BIP-39 secret into Bitcoin Core. >> >> Finally: >> * Exchange QRs for all of the above (and more) securely on the internet >> >> This will be done through two presentations: "Sharding Secrets to Protec= t=20 >> Your Bitcoin" and "Using Keylay to Securely Exchange Airgapped QRs". We= =20 >> think they'll both be of interest to the Bitcoin community & we invite y= ou=20 >> to attend! >> >> WHAT? Securing Your Bitcoin with Entropy, Seeds, Shards, Airgaps, and Mo= re >> >> WHEN? August 5th, 10am PT >> >> WHERE?=20 >> https://us02web.zoom.us/j/88143195571?pwd=3DrgVeDCgOKT3IMtBiISego4p5wK0s= 6F.1 >> >> Shannon Appelcline (that's me!), Lead Author of Learning Bitcoin from th= e=20 >> Command Line, will present on *"Sharding Secrets to Protect Your=20 >> Bitcoin"*. Currently, Bitcoin Core doesn't support a number of notable= =20 >> resilience features such as BIP-39 entropy or mnemonics, seed import, or= =20 >> Shamir's Secret Sharing. This presentation will talk about the differenc= e=20 >> between BIP-32 and BIP-39 before demonstrating how to make use of all of= =20 >> these features while working with Bitcoin Core, either by importing an= =20 >> entropy-based descriptor into Bitcoin Core or exporting a master extende= d=20 >> key from it. It'll also offer additional best practices on using metadat= a=20 >> to ensure that you know what a secret is at some far future date when yo= u=20 >> recover it. >> >> Stan Reeves, Professor Emeritus of ECE, Auburn University, will present= =20 >> on *Keylay*. BIP-129 standardized the multisig setup file format, but=20 >> nothing standardizes how remote participants exchange it. In practice,= =20 >> xpubs, descriptors, and PSBTs move over email, messaging apps, or=20 >> centralized coordinators, breaking air gaps and leaking metadata. Thie= =20 >> presentation will demonstrate a session-layer design for remote multisig= =20 >> coordination: ephemeral X25519 pairwise sessions with no accounts or=20 >> persistent identity, a relay treated as adversarial (ciphertext only),= =20 >> air-gap bridging via BC-UR/BBQr animated QR, and pluggable transport=20 >> targeting Nostr (websocket now, Nostr proposed).=20 >> >> Shannon >> Lead Tech Writer >> Blockchain Commons >> > --=20 You received this message because you are subscribed to the Google Groups "= Bitcoin Development Mailing List" group. To unsubscribe from this group and stop receiving emails from it, send an e= mail to bitcoindev+unsubscribe@googlegroups.com. To view this discussion visit https://groups.google.com/d/msgid/bitcoindev/= 215e626f-972d-493e-97de-b43259c8403bn%40googlegroups.com. ------=_Part_1370631_1721100788.1785976903806 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hey Folks,

We held our meeting today about Bitcoin interoperabili= ty & resilience. We've got all the records of the meeting including the= full meeting video and slides here:

https://developer.blockchai= ncommons.com/meetings/2026-08-resilience/

I pres= ented specifically on Bitcoin Core, showing off some tools (and a technique= ) for extracting a descriptor or master private key from Bitcoin Core so th= at you can better preserve it using Shamir's Secret Sharing.=C2=A0

https://www.youtube.com/watch?v=3DckUwWCFqua8
=
We also had a presentation from Stan Reeves on Keylay, a t= echnology he's putting together to make multisigs easier by allowing the cl= ean transmission of QRs and Animated QRs through a secure communication sys= tem. That video is here:

https://www.youtube.com/watch?v=3DoAsxo= o3Rqn4

Shannon

On Tuesday, August 4, 2026 at 10:03:31=E2= =80=AFAM UTC-10 Shannon Appelcline wrote:
Hey Folks,

Just a reminder = that this presentation is tomorrow:


WHAT? Securing Your B= itcoin with Entropy, Seeds, Shards, Airgaps, and More
WHEN? August 5th, = 10am PT
WHERE?=C2=A0https://us02web.zoom.us/j/88143195571?pwd= =3DrgVeDCgOKT3IMtBiISego4p5wK0s6F.1

The Co= ldcard seed-creation failure revealed over the weekend definitely showed of= f one of the many ways that self-sovereign controlled funds can be vulnerab= le. Some of the techniques that I plan to talk about tomorrow help you to c= ontrol the fallout of that sort of failure by maintaining good metadata tha= t records where a seed or key originated from.

Hop= e to see you there.

Shannon

On Thursday, July 30, 2026 at= 1:40:45=E2=80=AFPM UTC-10 Shannon Appelcline wrote:
Next Wednesday, August 5th at 10am PT, Block= chain Commons will host a Bitcoin-focused Gordian Developers Meeting about = improving the protection of your secrets.

The general goal is to dem= onstrate how you can ensure the resilience of your Bitcoin Core=E2=80=93sto= red assets by integrating Bitcoin Core into the wider Bitcoin ecosystem.
We will demonstrate how to:
* Export descriptors from Bitcoin Core= .
* Export extended private keys from Bitcoin Core.
* Use Shamir'= s Secret Sharing & metadata to store & protect that exported data.<= br>
Also:
* Create a BIP-39 secret remotely.
* Shard that secret.<= br>* Import descriptors derived from the BIP-39 secret into Bitcoin Core.
Finally:
* Exchange QRs for all of the above (and more) securely o= n the internet

This will be done through two presentations: "Sh= arding Secrets to Protect Your Bitcoin" and "Using Keylay to Secu= rely Exchange Airgapped QRs". We think they'll both be of interest= to the Bitcoin community & we invite you to attend!

WHAT? Secur= ing Your Bitcoin with Entropy, Seeds, Shards, Airgaps, and More

WHEN= ? August 5th, 10am PT

WHERE? https://us02web.zoom.us/j/88143195571?pwd=3DrgVeDCgOKT3IMt= BiISego4p5wK0s6F.1

Shannon Appelcline (that's me!), Lead Aut= hor of Learning Bitcoin from the Command Line, will present on "Sha= rding Secrets to Protect Your Bitcoin". Currently, Bitcoin Core do= esn't support a number of notable resilience features such as BIP-39 en= tropy or mnemonics, seed import, or Shamir's Secret Sharing. This prese= ntation will talk about the difference between BIP-32 and BIP-39 before dem= onstrating how to make use of all of these features while working with Bitc= oin Core, either by importing an entropy-based descriptor into Bitcoin Core= or exporting a master extended key from it. It'll also offer additiona= l best practices on using metadata to ensure that you know what a secret is= at some far future date when you recover it.

Stan Reeves, Professor= Emeritus of ECE, Auburn University, will present on Keylay. BIP-129= standardized the multisig setup file format, but nothing standardizes how = remote participants exchange it. In practice, xpubs, descriptors, and PSBTs= move over email, messaging apps, or centralized coordinators, breaking air= gaps and leaking metadata. Thie presentation will demonstrate a session-la= yer design for remote multisig coordination: ephemeral X25519 pairwise sess= ions with no accounts or persistent identity, a relay treated as adversaria= l (ciphertext only), air-gap bridging via BC-UR/BBQr animated QR, and plugg= able transport targeting Nostr (websocket now, Nostr proposed).=C2=A0
<= br>
Shannon
Lead Tech Writer
Blockchain Commo= ns

--
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To unsubscribe from this group and stop receiving emails from it, send an e= mail to bitcoind= ev+unsubscribe@googlegroups.com.
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