* [bitcoindev] Bitcoin Resilience Presentations — August 5
@ 2026-07-30 23:00 Shannon Appelcline
2026-08-04 19:56 ` [bitcoindev] " Shannon Appelcline
0 siblings, 1 reply; 3+ messages in thread
From: Shannon Appelcline @ 2026-07-30 23:00 UTC (permalink / raw)
To: Bitcoin Development Mailing List
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Next Wednesday, August 5th at 10am PT, Blockchain Commons will host a
Bitcoin-focused Gordian Developers Meeting about improving the protection
of your secrets.
The general goal is to demonstrate how you can ensure the resilience of
your Bitcoin Core–stored 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.
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 Protect
Your Bitcoin" and "Using Keylay to Securely Exchange Airgapped QRs". We
think they'll both be of interest to the Bitcoin community & we invite you
to attend!
WHAT? Securing Your Bitcoin with Entropy, Seeds, Shards, Airgaps, and More
WHEN? August 5th, 10am PT
WHERE?
https://us02web.zoom.us/j/88143195571?pwd=rgVeDCgOKT3IMtBiISego4p5wK0s6F.1
Shannon Appelcline (that's me!), Lead Author of Learning Bitcoin from the
Command Line, will present on *"Sharding Secrets to Protect Your Bitcoin"*.
Currently, Bitcoin Core doesn't support a number of notable resilience
features such as BIP-39 entropy or mnemonics, seed import, or Shamir's
Secret Sharing. This presentation will talk about the difference between
BIP-32 and BIP-39 before demonstrating how to make use of all of these
features while working with Bitcoin Core, either by importing an
entropy-based descriptor into Bitcoin Core or exporting a master extended
key from it. It'll also offer additional 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-layer design for remote multisig coordination:
ephemeral X25519 pairwise sessions with no accounts or persistent identity,
a relay treated as adversarial (ciphertext only), air-gap bridging via
BC-UR/BBQr animated QR, and pluggable transport targeting Nostr (websocket
now, Nostr proposed).
Shannon
Lead Tech Writer
Blockchain Commons
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* [bitcoindev] Re: Bitcoin Resilience Presentations — August 5
2026-07-30 23:00 [bitcoindev] Bitcoin Resilience Presentations — August 5 Shannon Appelcline
@ 2026-08-04 19:56 ` Shannon Appelcline
2026-08-06 0:41 ` Shannon Appelcline
0 siblings, 1 reply; 3+ messages in thread
From: Shannon Appelcline @ 2026-08-04 19:56 UTC (permalink / raw)
To: Bitcoin Development Mailing List
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Hey Folks,
Just a reminder that this presentation is tomorrow:
WHAT? Securing Your Bitcoin with Entropy, Seeds, Shards, Airgaps, and More
WHEN? August 5th, 10am PT
WHERE?
https://us02web.zoom.us/j/88143195571?pwd=rgVeDCgOKT3IMtBiISego4p5wK0s6F.1
The Coldcard seed-creation failure revealed over the weekend definitely
showed off one of the many ways that self-sovereign controlled funds can be
vulnerable. Some of the techniques that I plan to talk about tomorrow help
you to control the fallout of that sort of failure by maintaining good
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 PM UTC-10 Shannon Appelcline wrote:
> Next Wednesday, August 5th at 10am PT, Blockchain Commons will host a
> Bitcoin-focused Gordian Developers Meeting about improving the protection
> of your secrets.
>
> The general goal is to demonstrate how you can ensure the resilience of
> your Bitcoin Core–stored 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.
>
> 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 Protect
> Your Bitcoin" and "Using Keylay to Securely Exchange Airgapped QRs". We
> think they'll both be of interest to the Bitcoin community & we invite you
> to attend!
>
> WHAT? Securing Your Bitcoin with Entropy, Seeds, Shards, Airgaps, and More
>
> WHEN? August 5th, 10am PT
>
> WHERE?
> https://us02web.zoom.us/j/88143195571?pwd=rgVeDCgOKT3IMtBiISego4p5wK0s6F.1
>
> Shannon Appelcline (that's me!), Lead Author of Learning Bitcoin from the
> Command Line, will present on *"Sharding Secrets to Protect Your Bitcoin"*.
> Currently, Bitcoin Core doesn't support a number of notable resilience
> features such as BIP-39 entropy or mnemonics, seed import, or Shamir's
> Secret Sharing. This presentation will talk about the difference between
> BIP-32 and BIP-39 before demonstrating how to make use of all of these
> features while working with Bitcoin Core, either by importing an
> entropy-based descriptor into Bitcoin Core or exporting a master extended
> key from it. It'll also offer additional 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-layer design for remote multisig
> coordination: ephemeral X25519 pairwise sessions with no accounts or
> persistent identity, a relay treated as adversarial (ciphertext only),
> air-gap bridging via BC-UR/BBQr animated QR, and pluggable transport
> targeting Nostr (websocket now, Nostr proposed).
>
> Shannon
> Lead Tech Writer
> Blockchain Commons
>
--
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* [bitcoindev] Re: Bitcoin Resilience Presentations — August 5
2026-08-04 19:56 ` [bitcoindev] " Shannon Appelcline
@ 2026-08-06 0:41 ` Shannon Appelcline
0 siblings, 0 replies; 3+ messages in thread
From: Shannon Appelcline @ 2026-08-06 0:41 UTC (permalink / raw)
To: Bitcoin Development Mailing List
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Hey Folks,
We held our meeting today about Bitcoin interoperability & resilience.
We've got all the records of the meeting including the full meeting video
and slides here:
https://developer.blockchaincommons.com/meetings/2026-08-resilience/
I presented specifically on Bitcoin Core, showing off some tools (and a
technique) for extracting a descriptor or master private key from Bitcoin
Core so that you can better preserve it using Shamir's Secret Sharing.
https://www.youtube.com/watch?v=ckUwWCFqua8
We also had a presentation from Stan Reeves on Keylay, a technology he's
putting together to make multisigs easier by allowing the clean
transmission of QRs and Animated QRs through a secure communication system.
That video is here:
https://www.youtube.com/watch?v=oAsxoo3Rqn4
Shannon
On Tuesday, August 4, 2026 at 10:03:31 AM 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 More
> WHEN? August 5th, 10am PT
> WHERE?
> https://us02web.zoom.us/j/88143195571?pwd=rgVeDCgOKT3IMtBiISego4p5wK0s6F.1
>
> The Coldcard seed-creation failure revealed over the weekend definitely
> showed off one of the many ways that self-sovereign controlled funds can be
> vulnerable. Some of the techniques that I plan to talk about tomorrow help
> you to control the fallout of that sort of failure by maintaining good
> 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 PM UTC-10 Shannon Appelcline wrote:
>
>> Next Wednesday, August 5th at 10am PT, Blockchain Commons will host a
>> Bitcoin-focused Gordian Developers Meeting about improving the protection
>> of your secrets.
>>
>> The general goal is to demonstrate how you can ensure the resilience of
>> your Bitcoin Core–stored 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.
>>
>> 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 Protect
>> Your Bitcoin" and "Using Keylay to Securely Exchange Airgapped QRs". We
>> think they'll both be of interest to the Bitcoin community & we invite you
>> to attend!
>>
>> WHAT? Securing Your Bitcoin with Entropy, Seeds, Shards, Airgaps, and More
>>
>> WHEN? August 5th, 10am PT
>>
>> WHERE?
>> https://us02web.zoom.us/j/88143195571?pwd=rgVeDCgOKT3IMtBiISego4p5wK0s6F.1
>>
>> Shannon Appelcline (that's me!), Lead Author of Learning Bitcoin from the
>> Command Line, will present on *"Sharding Secrets to Protect Your
>> Bitcoin"*. Currently, Bitcoin Core doesn't support a number of notable
>> resilience features such as BIP-39 entropy or mnemonics, seed import, or
>> Shamir's Secret Sharing. This presentation will talk about the difference
>> between BIP-32 and BIP-39 before demonstrating how to make use of all of
>> these features while working with Bitcoin Core, either by importing an
>> entropy-based descriptor into Bitcoin Core or exporting a master extended
>> key from it. It'll also offer additional 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-layer design for remote multisig
>> coordination: ephemeral X25519 pairwise sessions with no accounts or
>> persistent identity, a relay treated as adversarial (ciphertext only),
>> air-gap bridging via BC-UR/BBQr animated QR, and pluggable transport
>> targeting Nostr (websocket now, Nostr proposed).
>>
>> Shannon
>> Lead Tech Writer
>> Blockchain Commons
>>
>
--
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