# Letter (July 24)

Hi Folks,

We are very excited for our August Gordian Developer Meeting (Wednesday, August 7th, 10am PDT) because we'll be focusing on seed resilience, with BIP-85 champion Aneesh Karve offering the main presentation of our meeting, on BIP-85.

BIP-85 is a method for deterministically generating children seeds from a master seed using a simple index. It allows a single master seed to generate the seeds used in multiple wallets. It's especially useful for hot wallets, as a master seed held in cold storage can create children seeds for them. Aneesh will reveal the specifics, talking about the current status of BIP-85, how it can be used by developers, and why it's often more useful than deriving hierarchical deterministic keys.

WHAT? BIP-85 / Seed Resilience Gordian Developer Meeting
WHEN? Wednesday August 7th, 10am PDT (1pm EDT, 7pm CEST)
WHERE? https://us02web.zoom.us/j/83804165219?pwd=mrV3y0uT9gNbz5SOh01baGilJL90Ar.1

Beyond Aneesh's feature presentation on BIP-85, August's meeting will be all about seeds and ensuring their resilience. What features should we be including in our seed storage as best practices? BIP-85, descriptors, other metadata, or something else? Which features are worth incorporating into Blockchain Commons' own reference apps, our recently released [seedtool-cli for Rust](https://github.com/BlockchainCommons/seedtool-cli-rust) and [Seedtool for iOS](https://apps.apple.com/us/app/gordian-seed-tool/id1545088229)? Bring your own seed-related topic and we'll be happy to discuss that too!

Our discussion of seeds will also cover the recent release of SSKR for Ledger, which makes Blockchain Commons' seed-backup method available to 7 million wallets.

A calendar invite is included that contains the meeting information and URL. We hope to see you there!

The Blockchain Commons Team
Christopher Allen, Wolfgang McNally, and Shannon Appelcline

# Tweetstorm (August 1)

(posted August 5th with minor changes: https://x.com/ChristopherA/status/1820394209821831336)

As a reminder, the special @BlockchainComns BIP-85 presentation for wallet developers is coming up next Wednesday, the 7th. [1/7] https://github.com/BlockchainCommons/Gordian-Developer-Community/blob/master/meetings/bip85-meeting.md

As hardware wallets proliferate, as multisigs come into increased use, and as digital currencies become more commonplace, you'll likely end up with more than one seed for your assets. BIP-85 is how to manage that. [2/7]

BIP-85 specifies how to generate children seed from a master seed, so you can have "One Seed to rule them all". [3/7] https://github.com/bitcoin/bips/blob/master/bip-0085.mediawiki

We'll also talk about other ways to improve seed resilience at our meeting. The link (below) has the URL for the meeting and a calendar invite. [4/7] https://github.com/BlockchainCommons/Gordian-Developer-Community/blob/master/meetings/bip85-meeting.md

Ensuring users don't lose their digital assets is one of the most challenging elements of self-sovereign asset control. It's been one of the priorities at @BlockchainComns from the start. [5/7] https://www.smartcustody.com/

Subscribe to our announcements-only list to learn about the topics of our wallet developers meeting every month! [6/7]

If self-sovereign control over digital assets is important to you, or if you just want to make digital-asset wallets better, become a patron of @BlockchainComns. [7/7] https://github.com/sponsors/BlockchainCommons

# Tweetstorm (July 25)

https://x.com/ChristopherA/status/1816519166557630840

How do you create, manage & store digital-asset seeds in a way that's secure & resilient? That's a question that @BlockchainComns has worked on since the start & we're thrilled to talk about an important tool at our meeting this August: BIP-85. [1/10] https://github.com/BlockchainCommons/Gordian-Developer-Community/blob/master/meetings/bip85-meeting.md

At our August Gordian Developers Meeting (August 7th, 10am PDT), BIP-85 champion Aneesh Karve @akarve will give a feature presentation on BIP-85. If you're a wallet developer, or just interested in Bitcoin, just us! [2/10] https://github.com/BlockchainCommons/Gordian-Developer-Community/blob/master/meetings/bip85-meeting.md

The BIP-85 cheekily states: "One Seed to rule them all, One Key to find them, One Path to bring them all, And in cryptography bind them." [3/10] https://github.com/bitcoin/bips/blob/master/bip-0085.mediawiki#abstract

BIP-85 is fundamentally a way to use a master seed to deterministically generate children seed, so you can safely use one seed to manage seeds on a multitude of devices. [4/10]

What is BIP-85's current state? What are the use cases for it instead of HD keys? What is its future? We hope to cover that and more at our August Gordian Developers Meeting. [5/10]

More generally, August's Gordian Developers Meeting will cover a variety of topics about seeds, which are the heart of protecting your digital assets. We'll talk about about backup methods such as SSKR, the use of metadata, and more! [6/10]

Bring your own seed-related topics! We'd love to talk about them! Our ultimate goal is to create interoperable specifications and best practices that help everyone in the digital-asset space (especially users!) [7/10]

Click through to our August Meeting page to download an ICS file to put the BIP-85 & Seed meeting on your calendar. [8/10] https://github.com/BlockchainCommons/Gordian-Developer-Community/blob/master/meetings/bip85-meeting.md

Subscribe to Blockchain Commons' announcements-only mailing list for wallet developers to see the monthly announcements for our meetings and feature presentations. [9/10] https://www.blockchaincommons.com/subscribe/

Support Blockchain Commons' work by becoming a GitHub patron. Every sponsorship, big or small, helps to demonstrate the importance of our work. [10/10] https://github.com/sponsors/BlockchainCommons