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<img src="https://www.Blockchaincommons.com/images/bcc-card.jpg" width=1024>
<font size="5">Blockchain Commons #Gordian Meeting
2025-03-05</font>
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## <img src="https://i.imgur.com/QyDl5nK.png" width="192" height="192"></br> What is Blockchain Commons?
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* We are a community interested in 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.
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Today we're featuring a special presentation from one our partners!
<br><Br>
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<b>Foundation Devices</b><br>
<img src="https://hackmd.io/_uploads/ryJvOjiqyg.jpg" width="30%" style="border: 1px solid gray">
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<br><br>
Become a sponsor!
Mail us at team@blockchaincommons.com
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## <img src="https://i.imgur.com/QyDl5nK.png" width=192 height="192"><br/>Today's Topics
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- Quantum Computing
- QuantumLink from Foundation
- PQC in the Gordian Stack
- The Zcash ZeWIF Project
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## <img src="https://i.imgur.com/QyDl5nK.png" width=192 height="192"><br/>Quantum Computing (I)
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- Quantum Computers take advantage of superposition & entanglement
- Can do some computing tasks faster
- A 1994 paper described how RSA could be broken by quantum computing
- ECDSA, ECDH, and DSA are also insecure with quantum computing
- AES-256 and SHA-3 require larger output
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## <img src="https://i.imgur.com/QyDl5nK.png" width=192 height="192"><br/>Quantum Computing (II)
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- Quantum computers really exist. This isn't SF!
- Google: Willow, chip with 105 physical qubits
- Due to error correction, this is just a handful of logical qubits!
- Need thousands of logical qubits to break algorithms
- Microsoft: Majorana claims a path to 1M physical qubits
- Ultimately, these are laboratory experiments
- Crypto attacks might be 5-10 years off, but we don't know
- We need Post-Quantum Cryptography (PQC)
- But right now, use only if you need protection for 5-50 years
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## <img src="https://hackmd.io/_uploads/ryJvOjiqyg.jpg" width=192 height="192"><br/>Foundation's Passport Prime
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- Foundation recently announced <font color="#FFBF00">Passport Prime</font>
- A Personal Security Assistant!
- Stores Seeds, Bitcoin, 2FA codes, Security Keys
- Encrypted Files Too
- But There's even more going on under the hood!
- Passport Prime is moving toward a post-quantum reality
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_Over to Ken ..._
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<img src="https://hackmd.io/_uploads/SJRQCps9Jx.png" width="80%" style="border: 2px solid gray">
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_Over to Wolf ..._
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<img src="https://hackmd.io/_uploads/rJxN2xSjJl.png" width="80%" style="border: 2px solid gray">
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## <img src="https://i.imgur.com/QyDl5nK.png" width=192 height="192"><br/>The ZeWIF Project
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- Working on an extensible interchange format for Zcash wallets
- with our partner Zingo Labs
- In January, released reports
- https://github.com/zingolabs/zcash-wallet-format
- Starting in on migration tool
- https://github.com/BlockchainCommons/zmigrate
- Fully reads zcashd
- Test it on your wallet! Or give us empty wallets to test!
- Specification to follow
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## <img src="https://i.imgur.com/QyDl5nK.png" width=192 height="192"><br/>Why ZeWIF is Important
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- Interchange allows people to freely move their funds
- They don't get locked into a single wallet
- Standardization ensures that things don't get lost
- ZL's ZExCavator tool will help to recover already lost funds
- These are Gordian Principles
- Openness, Independence, Resilience!
- They support self-sovereign managment of digital assets
- We'd love to do this sort of work on other blockchains!
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<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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