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Huszonegy

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openoms 1y ago 💬 7

Planning to show this setup tonight:

Truely FOSS Satochip javacards https://github.com/Toporin/SatochipApplet initialized with an airgapped, stateless nostr:npub17tyke9lkgxd98ruyeul6wt3pj3s9uxzgp9hxu5tsenjmweue6sqq4y3mgl .

The cards act as a hardware wallet without a display, but with a PIN protected secure element. Mess up the PIN 10 times and the card is bricked. Blanks cost ~2 dollars with chip, ~5 dollars with NFC support. Can compare with #TapSigner, #BitKey and alike.

Find the modded images supporting the smartcard readers here: https://github.com/3rdIteration/seedsigner/releases

Parts:

- a generic smartcard reader (here ACR39U https://a.aliexpress.com/_EzkLWc9 + microUSB adapter)

- can use the same cards as the SpecterDIY

Notes: https://gist.github.com/openoms/510b2876cab19e15c4190456ea8aad82

nostr:note1hatuatxl5hajvh6xdfy3pqkuc0hna2azaap3y6sza3nc6jnpk7lsz7tlkv

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Discussion

SUPERMAX 1y ago

Absolutely will build this 💪

openoms 1y ago

Sparrow Wallet works out of the box with these https://satochip.io/ cards (same when DIY).

Even tested on TailsOS.

Electrum Wallet also has a fork (close to be merged) which works, not in the Bitcoin Core HWI yet.

An iOS and Android app is in the works. Hoping for Nunchuk to follow.

Printer 1y ago

I'm ordering all of those parts right now.

Marcelinho 1y ago

again something I want to play with 🤭

Sawzall 1y ago

So cool, need to try this!

DopeMind 1y ago

nostr:npub1l5pxvjzhw77h86tu0sml2gxg8jpwxch7fsj6d05n7vuqpq75v34syk4q0n what is your opinion on this set up and also on seedsigner+seedkeeper ?

openoms 1y ago 💬 5

Wrote a quick guide about using an initialized Satochip smart card with Sparrow Wallet: https://github.com/openoms/bitcoin-tutorials/tree/master/satochip#get-started-with-satochip

As these javacards are essentially $5 hardware wallets (with no screen, but using a Secure Element) are great to give bitcoin in a physical form.

This short guide is for the ones receiving them.

To initialize the cards one could use TailsOS offline with Sparrow Wallet or Electrum or a modded version of Seedsigner: nevent1qvzqqqqqqypzp2kq0k2s388x4hcghy2k6s7p5j44jnrpxzmaevfwcxvsprzcrx30qyw8wumn8ghj7mn0wd68ytngw4eh5mmwv4nhjtnhdaexcep0qy38wumn8ghj7mt4d36xjurvv4ux2u3wdp6hx7n0dejkw7fwwahhymry9uqzpaca0y00n4qs4k5drhwaz99vuy78r6ddqxu7hwxy8xghj45knkh5jgfqlz