Dave Blumenfeld
@serdave-eth
Building privacy preserving tools and infra at www.keypo.io. Founder of DaveDAO. Very interested in blockchains, TEEs, and secrets sharing.
Pinned
I’ve never found a solution for managing my seed phrases that didn’t keep me up at night
Write it down, Multisigs, Password managers: they all have major flaws.
So I decided to build a product for me and all my weird internet friends.
Introducing: Keypo
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My first principle: permanence. What works today should work years from now.
That means avoiding external libraries and APIs. And that’s why for Keypo we chose @privy's Shamir secret sharing library. Pure vanilla typescript, guaranteed to work in perpetuity.
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A lot of talk about what's gonna happen to clarity act next.
Coinbase's "no bill is better than a bad bill" approach feels like they're playing with fire.
There's never been a better time to get legislation passed, and that could immediately change depending on 2026 midterms.
Keypo splits your seed phrase across Mac, iPhone and Yubikey. Recover with any two.
Metadata on iCloud Keychain makes recovery easy (but you’ll always need your devices + biometrics to recover).
Lost access to iCloud? You can use Emergency Recovery to bypass it entirely.
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Thank you to everyone who participated in the Keypo beta.
We're officially in app store review!
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Keypo uses Shamir secret sharing to split your seed phrase into encrypted pieces stored on devices you already own: Mac, iPhone, and Yubikey.
But what if you don't have a Yubikey?
No problem! Use just Mac + iPhone, or Mac + 2 iPhones:
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Keypo’s core design principle is self custody.
That means no subscription and no personal information required.
So when you need your seed phrases, you're not wondering if your credit card is still on file.
Try Keypo today: keypo.io
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Keypo now supports more than seed phrases! Use Keypo to back-up secrets like your github recovery codes. No single point of failure, backed by hardware security and biometrics.
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Trying to level up my Claude Code setup.
Today I added @jarrodwatts interview skill, which works great with planning mode.
Tomorrow I'm planning to try Anthropic's code simplifier agent.
Any other tools/skills/agents I should try?
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Last month the SEC published guidance on how to custody your crypto.
And what’s in bold and with exclamation points: Protect your seed phrase!
If you’re still writing your seed phrase on a piece of paper, you should check out Keypo.
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Keypo protects your seed phrase using hardware security. This means the keys never leave the physical chip and makes it significantly harder to hack vs. software security (used by most pw managers).
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A common Keypo question: where are my seed phrase shares stored?
Metadata and Yubikey encrypted shares are stored on your iCloud keychain (due to Yubikey storage limits).
iPhone and Laptop shares stay encrypted locally.
And Keypo NEVER collects PII.
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What are the best DIY hardware wallets out there?
Just learned about this one: seedsigner.com
Haven't tinkered with hardware since leaving my old job, but with the ledger incident this week, I'm intrigued.
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Never forget your seed phrase.
Keypo splits it across devices you already own, backed by biometric auth.
Using P2P communication between your devices for storing each piece and recovery, your seed phrase never touches the cloud.
Check it out in action:
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Did you know that Bank Safety Deposit Boxes aren’t 100% safe?
There are hundreds of cases a year where valuables go missing. And unlike cash deposits, safety deposit boxes aren’t insured.
You need a digital safety deposit box. Use keypo.io.
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