A former colleague of mine unfortunately fell victim to the ongoing Coldcard attack and was robbed. The stolen funds are currently sitting idle among others at the following address:

The Mempool Open Source Project®

Explore the full Bitcoin ecosystem with The Mempool Open Source Project®. See the real-time status of your transactions, get network info, and more.

For the #aosconvergence 2026 hackathon, @Blueocean and I built a proof of concept showing how passkeys can be used with Nostr on iOS. The goal was to explore whether passkeys (Face ID, Touch ID, security keys, etc.) can simplify Nostr onboarding by eliminating the need to manage private keys, seed phrases, browser extensions, and separate signing apps. Instead of asking users to understand cryptography, we let them create a passkey and start using Nostr with a familiar authentication flow. This is an early proof of concept, not a production-ready application, but the UX feels promising and raises some interesting questions about the future of Nostr identity and key management. Source code:

GitHub

GitHub - schjonhaug/nostr-passkey-poc: Nostr Passkey Proof of Concept for deriving deterministic Nostr identity secrets from synced passkey PRF output.

Nostr Passkey Proof of Concept for deriving deterministic Nostr identity secrets from synced passkey PRF output. - schjonhaug/nostr-passkey-poc

#nostr #passkeys #webauthn #ios #opensource #oas2026

GM

If you happen to be in #Madeira on #Bitcoin genesis day, Friday January 3rd, join me at #freemadeira and learn about setting up multivendor multisig wallets.

Meetup

FREE Madeira Bitcoin Meetup, Fri, Jan 3, 2025, 6:30 PM | Meetup

Find Meetup events so you can do more of what matters to you. Or create your own group and meet people near you who share your interests.

Bom dia #picodacruz #funchal #madeira

#madeira #funchal

Lil #satoshi

I’ve made a #golang implementation of the #Satscard #Bitcoin NFC protocol

GitHub

GitHub - schjonhaug/tapcards: This project is a Go language implementation of the Coinkite Tap Cards NFC protocol, specifically focusing on the Satscard functionality.

This project is a Go language implementation of the Coinkite Tap Cards NFC protocol, specifically focusing on the Satscard functionality. - schjonh...

Memes all the way down #bitcoin #bh2023

Here we go again! #bitcoin #riga #bh2023

@makrokoppen 2023 ☕️

I’ve translated #[0]​ ‘s insightful long read titled “Bitcoin is time” into Norwegian. His work, including this article, has been crucial in enhancing my understanding of Satoshi’s groundbreaking work:

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