🔐 Learn how to create a seed phrase by hand in under 10 minutes! Penlock's solution is easy, fast, well-researched, and secure: ○ Works with any wallet ○ Video and illustrated guides available ○ No reliance on third-party tools or websites (OMG please don't do that 🫣!!) ○ Close to maximum entropy: paper tiles have a 1–2% bias, better than basic dice (5–10%) and coins (10–20%) Printable components + written guide: 🔗

Penlock / Generate a Seed Phrase

Generate a new 12-word seed phrase using real-world, provable randomness.

Available in 🇬🇧 English and 🇰🇷 Korean (auto-detected). Please DM me on Nostr if you'd like to help with additional translations. 📣 Feel free to share widely and across networks — the tool is MIT licensed, and the video is public domain (CC0)!

Two weeks ago, I put up a new presentation for @BOBSpace_BKK : “Self-custody, what could go wrong?” It was fun to run interactively, and we found a grand total of 17 failure modes. Luckily, most of them are already well understood and/or mitigated. A few still need more progress, but for now I’m convinced Penlock helps address the most pressing ones. Last week, I led the Penlock workshop along with @Jin at @gandlaf21 ’s Base21 in Busan, including some new content on entropy. It was really great to finally visit the space and meet the community there. Thank you guys again for your warm welcome, and for the fun evening!

Thanks again to Taz for leading a successful workshop at Le Paradigme Bitcoin! For anyone interested in learning more about the conference, a complete report is available here:

Stacker News

Paradigme Bitcoin in Switzerland 🇨🇭 5th edition \ stacker news

It was the 5th edition of Paradigme Bitcoin, a conference centered around Bitcoin in Neuchatel, Switzerland mostly in French. I found the atmospher...

Recently I've come across a number of "security"/"educational" web apps that invite you to enter your seed phrase into a webpage — honestly, this is insane! 🤯 Generally, these services are targeted at security-minded users and feature a big warning telling you to turn off internet to stay safe. Here's how it could go wrong: - A malware could be recording keystrokes for later harvesting. - The webpage could be recording the seed phrase for later harvesting. - A third-party analytics script could be recording keystrokes for later harvesting (some of these pages actually embed Google Analytics!!) 👀 - A hardware keylogger could be recording your keystrokes for later harvesting. The general rule is simple: if you use a hardware wallet, never *ever* enter the seed phrase on a general computer; you'd be degrading your security to the level of a software wallet, defeating the point. And if you need to generate or split a seed phrase without compromising on security, Penlock is there for you. 🛡️

🇨🇭 Taz will host the very first Penlock workshop in French on June 26th at Le Paradigme Bitcoin in Neuchâtel, Switzerland! Feel free to drop by and say hi 👋 🔗 Full program:

Programme 2026

Programme de Paradigme Bitcoin 2026

Home sweet home! Penlock is now available to buy at the @Bitcoin House Bali 🏝️... I guess we've come full circle!

Thank you Emily for the sleek design, everyone loves it! View quoted note →

@npub12egc...7243 now ships Penlock kits individually to the US, Canada, Mexico, Western Europe, Thailand, and Japan! You can find them here:

Seed Keys

Penlock: Offline Tool to Generate, Split, and Recover Seed Phrases

Discover Penlock, the paper-based tool to generate seed phrases, split them into 2-of-3 backups, and recover them offline using proven cryptography.

Also, check out their metal backup — it's definitely one of the best 24-word metal backups on the market! You can store your Penlock shares on it by using an electric engraver instead of stamping. Can't wait for a 12-word version that's fully Penlock compatible! There's also a shipping option in South Korea, thanks to @Coconut. : https://store.btcmap.kr/stores/powbitcoiner/ Meanwhile, we're busy setting up our own Geyser shop, where you'll find kits in bulk (packs of 10 and 50), as well as private support, consulting, and more! View quoted note →

Huge thanks to @AnnieV and @Miss ₿anks for hosting the workshop, and to the Munks for coming! Despite a microphone failure and some early connectivity issues, we still managed to run a great interactive session. Also, thanks to @₽sy𝑓er for setting this up — definitely inspiring me to create more video content in the future. Stay tuned!

We're live at https://meet.fulmo.org/cmhonline ! Join us for an online Penlock workshop with London's Munks!

🔥 Saturday 28th at 10am UTC, Penlock and @CYPHERMUNK HOUSE | LONDON will host an *online* workshop on how to improve your self‑custody with Penlock! 🔐✨ Learn how to turn a seed phrase into a 2‑of‑3 backup for higher security, offsite recovery, and trust‑minimized inheritance. The workshop will be interactive! If you got your Penlock kit at the Munkfest (courtesy of @Angor ) or anywhere else, please cut the tiles before the event and have the other components ready. When cutting, fold along the cutlines before detaching — these are a bit rough. Alternatively, you can print & assemble the wheel, the tiles and the wordlist from the components list at

Penlock / Split a Seed Phrase

Split your seed phrase into a 2-of-3 backup using Penlock

, and the sumtable from

Penlock / Recover a Seed Phrase

Recover a seed phrase by combining 2 Penlock shares belonging to the same set.

. Or just come and listen! Everybody's welcome :) View quoted note →

Here are a few shots from the Penlock workshop at the Australian @bitcoinbushbash 10 days ago, where some kits were given for free. We heard the feedback was extremely positive — great job, friends! View quoted note →

Here's our new Nostr banner by @emily , designed to match the kit's visuals! How do you like it?