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<img src="https://www.Blockchaincommons.com/images/bcc-card.jpg" width=1024>
<font size="5">Blockchain Commons #Gordian Meeting
2024-08-07</font>
---
## <img src="https://i.imgur.com/QyDl5nK.png" width="192" height="192"></br> What is Blockchain Commons?
<font size=6>
* We are a community supporting the self-sovereign control of digital assets.
* We bring together stakeholders to collaboratively develop interoperable infrastructure.
* We design decentralized solutions where everyone wins.
* We are a neutral "not-for-profit" that enables people to control their own digital destiny.
</font>
---
Thank you to our Sponsors!
<img src="https://hackmd.io/_uploads/ryThJwswC.png" style="border: 1px white solid;">
Become a sponsor!
Mail us at team@blockchaincommons.com
---
## <img src="https://i.imgur.com/QyDl5nK.png" width=192 height="192"><br/>Sponsorships
* It's been a tough year! We've lost a number of sponsors!
* They remain interested in supporting our technology.
* But they're having problems with funding.
* Become a sponsor, mail us at team@blockchaincommons.com
* We can also support your company on specific projects
* Open source & related to our specifications
* Talk to us!
* Thanks to:
* HRF for a Recent FROST Grant!
* Foundation Devices for recent GSTP Research Funding!
---
<font size="5">
<img src="https://i.imgur.com/QyDl5nK.png" width="128" height="128"></br>
Thanks also to individual sponsors!
* You help us to go to people like HRF & say we have developer support!
* Even $20/month makes a difference!
---
## <img src="https://i.imgur.com/QyDl5nK.png" width=192 height="192"><br/>Subscribe to Our Announcements
* https://www.blockchaincommons.com/subscribe/
* Announcements for Gordian Developers, FROST
* Announcements-only Mailing List
* Signal Discussion Channel
* For Google Calendar invite to regular Gordian meetings:
* Request from Christopher
* ChristopherA@LifeWithAlacrity.com
---
## <img src="https://i.imgur.com/QyDl5nK.png" width=192 height="192"><br/>Last Meeting
<font size=6>
- Seedtool in Rust
- Why SSH?
- SSH Envelope-CLI Updates
- Gordian Sealed Transaction Protocol (GSTP)
</font>
---
## <img src="https://i.imgur.com/QyDl5nK.png" width=192 height="192"><br/>Today's Topics
<font size=6>
- Seed Resilience
- Seeds in Blockchain Commons Tools
- BIP-85
- Ledger Seed Tool
- What's Next?
</font>
---
## <img src="https://i.imgur.com/QyDl5nK.png" width=192 height="192"><br/>Seed Resilience
<font size=6>
- Seeds are the heart of Digital Asset Security
- The “Layer 0” of Cryptographic Security
- Just 12 or 24 Bytes, But Crucial
- How do We Keep them Safe? (Security)
- How do We Avoid Losing them? (Resilience)
- We'll Explore that Today!
</font>
---
## <img src="https://i.imgur.com/QyDl5nK.png" width=128 height=128><br/>Blockchain Commons Specs & Tools
<font size=6>
- What's working so far?
- UR/Envelope for Seed Storage
- SSKR Sharding for Seed Resilience
- Request/Response for Seed Transfer & Key Derivation
- Reference Apps
- Seedtool-CLI-Rust
- Create & manage seeds on the command line
- Integrate with Envelope-CLI & Other Apps
- iOS Seedtool
- Best Practices app on your iPhone
- For helping developers implement & test standards!
</font>
---
<img src="https://hackmd.io/_uploads/rJg5Ckg5C.jpg" height=500>
---
## <img src="https://i.imgur.com/QyDl5nK.png" width=128 height=128><br/>Seed as Gordian Envelope
<font size=10>
```
ur:envelope/lftpsogdhkwzdtfthptokigtvwnnjsqzcxknsktdoyadcsspgmgreefy
```
</font>
<font size=6>
Minimal Bytewords convert to dCBOR:
</font>
<font size=10>
```
82d8c95059f2293a5bce7d4de59e71b4207ac5d2a10118c8
82 # array(2)
D8 C9 # tag(201)
50 # bytes(16)
59F2293A5BCE7D4DE59E71B4207AC5D2 # "Y\xF2):[\xCE}M\xE5\x9Eq\xB4 z\xC5\xD2"
A1 # map(1)
01 # unsigned(1)
18 C8 # unsigned(200)
```
</font>
---
## <img src="https://i.imgur.com/QyDl5nK.png" width=128 height=128><br/>Seedtool iOS & macOS Features
<font size=5>
- Create Seeds
- Identify Seeds
- Name, LifeHash, Object Identity Block
- Backup Seeds
- BIP-39, ByteWords, Hex
- Envelope
- Metadata, Name, Date, Note, Output Descriptors
- QRs
- Shard Seeds
- SSKR, SSKR-Envelope (CSR/Gordian Depository)
- Derive Keys
- Bitcoin, Ethereum, Tezos
- Sign Bitcoin PSBT requests
</font>
---
<img src="https://hackmd.io/_uploads/rJh67Gl5R.jpg" height=500>
---
#### Yinmn Blue in SeedTool for iOS/macOS
---
#### Yinmn Blue for offline PDF
---
## <img src="https://i.imgur.com/QyDl5nK.png" width=128 height=128><br/>Seedtool-CLI Features
<font size=5>
- Create Seeds
- Backup Seeds
- BIP-39, ByteWords, Hex
- Envelope
- Metadata, Name, Date, Note
- Multipart URs
- Shard Seeds
- SSKR, SSKR-Envelope (CSR/Gordian Depository)
- Translate Seeds
- Integrate with Envelope-CLI
- Signing
- Eliding
- Encryption
</font>
---
## <img src="https://i.imgur.com/QyDl5nK.png" width=128 height=128><br/>Using Seedtool-CLI
<font size=10>
```
$ seedtool
89290acafd0aafb21bd53904de47ed80
$ seedtool -i hex 89290acafd0aafb21bd53904de47ed80 -o bip39
matrix embark razor wheel priority suit hungry poet age vendor window abandon
$ seedtool -i hex 89290acafd0aafb21bd53904de47ed80 -o sskr -g 2-of-3
ur:envelope/lftansfwlrhdcetbsorflpmelgyaguurjzbdiyguetbzcyyacmldcwjennhnaysklgmsctgsrnhgcwtyrpeshnrfwkrnlepagdhszosghylgsocptepfwlaaaytkweiofnhddatansfphdcxkbtybwuyoelooeihvabtrohyrkdrkohnaymeiozmwschdnwtctsndtpyhgwlastkoyamtpsotantkphddarfbkaeadaerydepeprsblgpeswtnytndjlvwwkvehnaxdatecepaknnbytvwtomwttndjymywkhlwnbgkn
ur:envelope/lftansfwlrhdcetbsorflpmelgyaguurjzbdiyguetbzcyyacmldcwjennhnaysklgmsctgsrnhgcwtyrpeshnrfwkrnlepagdhszosghylgsocptepfwlaaaytkweiofnhddatansfphdcxkbtybwuyoelooeihvabtrohyrkdrkohnaymeiozmwschdnwtctsndtpyhgwlastkoyamtpsotantkphddarfbkaeadadpkynftjeoewmluoncfqdgerhghpkfdvadprtfwfnrpltrpahrdhnfwkgjyolcwmuasfybawe
ur:envelope/lftansfwlrhdcetbsorflpmelgyaguurjzbdiyguetbzcyyacmldcwjennhnaysklgmsctgsrnhgcwtyrpeshnrfwkrnlepagdhszosghylgsocptepfwlaaaytkweiofnhddatansfphdcxkbtybwuyoelooeihvabtrohyrkdrkohnaymeiozmwschdnwtctsndtpyhgwlastkoyamtpsotantkphddarfbkaeadaomumynncwcffpvdaefljncptpnsfdoskthewkwdhhrsndlkcyhpldcnnnhysbrfftcncmhlzc
$ seedtool -i hex 89290acafd0aafb21bd53904de47ed80 -o envelope | envelope format
Bytes(16) [
'isA': 'Seed'
]
```
</font>
---
## <img src="https://i.imgur.com/QyDl5nK.png" width=192 height="192"><br/>What's Next?
- Our main topic for the day!
- What's upcoming & just becoming available?
- How do we support it?
- How do we improve SECURITY & RESILIENCE for seeds?
---
## <img src="https://i.imgur.com/QyDl5nK.png" width=192 height="192"><br/>BIP-85
<font size=6>
- BIP-85 Uses a Single Seed for Multiple Wallets
- Children Seed Derived from Parent Seed
- with a Simple Index
- _One Seed to rule them all, One Key to find them,
One Path to bring them all, And in cryptography bind them._
</font>
---
## <img src="https://i.imgur.com/QyDl5nK.png" width=192 height="192"><br/>Ledger Seed Tool Application
<font size=6>
- A New Tool for Seed Resilience!
- Shamir's Secret Sharing on Ledger
- with Blockchain Commons' SSKR
- And Lots More Assistants!
- https://www.ledger.com/blog/seed-tool-app
- 7 million hardware wallets can now use SSKR!
</font>
---
## <img src="https://i.imgur.com/QyDl5nK.png" width=192 height="192"><br/>Key Exfiltration
<font size=6>
- We need to stay up to date with modern threats
- We've known about key exfiltration since 2018!
- It's about how keys could be compromized
- Through untrustworthy signatures
- Specifically, non-random nonces
- But randomness is important to seeds too!
- GSTP and FROST can help with both.
</font>
---
## <img src="https://i.imgur.com/QyDl5nK.png" width=192 height="192"><br/>What's Next?
<font size=6>
- There are lots of other ways to protect seeds
- BIP-85 for hot wallets is an example
- There are lots of adversaries to be concerned about
- Key Exfiltration is getting attention today
- What else?
- What features do we want for
- iOS Seedtool & Seedtool-CLI?
- Ledger Seed Tool?
</font>
---
## <img src="https://i.imgur.com/QyDl5nK.png" width=192 height="192"><br/>Possible Additions
<font size=6>
- Child Seed Derivation
- BIP-85
- More Key Derivations
- ZCash, Monero?
- Backup Mechanisms
- GSTP and Gordian Depository Deployment
- NFCs on NREF or smart JavaCards
- Key Generation and Multi-Party Computation
- Trusted Dealer & Distributed; MUSIG2 & FROST
- What Else?
</font>
---
## <img src="https://i.imgur.com/QyDl5nK.png" width=192 height="192"><br/>Get Involved!
<font size=6>
- Use Our Existing Specs
- UR for interoperable connections & animated QRs
- SSKR bytewords for simple sharding
- Envelope for Smart Storage
- Get In On the Next Thing: Collaborative Seed Recovery
- Shard your seeds & metadata with SSKR-Envelope
- Support GSTP, Host a Gordian Depository
</font>
---
<img src="https://i.imgur.com/QyDl5nK.png" width="128" height="128"></br>
www.BlockchainCommons.com
<img src="https://avatars.githubusercontent.com/ChristopherA?s=195">
Christopher Allen (@ChristopherA)
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