{
  "guid": "c7c95f2a-039e-51d9-94f4-0212b6513fed",
  "code": null,
  "id": 300140,
  "date": "2025-12-30T10:45:00+01:00",
  "start": "10:45",
  "duration": "02:00",
  "room": "CDC Triangle",
  "slug": "39c3-seedsigner-diy-bitcoin-signing-device-build-w_312i",
  "title": "SeedSigner DIY Bitcoin signing device build workshop",
  "subtitle": null,
  "language": "en",
  "track": null,
  "type": "Workshop",
  "abstract": "Build your own open-source Bitcoin signing device with a Raspberry Pi Zero, camera and display! We have kits for 45\u20ac",
  "description": "Seedsigners are open-source DIY signing devices which can be built using \"normal\" hardware like a Raspberry Pi and act as kind of hardware wallets to sign Bitcoin transactions. Since the hardware is missing a secure element chip, the keys are saved externally, usually via self-drawn QR-codes which are read again for every use via the build-in camera.\n\nWe brought a few kits with us which we sell for 45\u20ac and build together. We will lashing the firmware on the MicroSD card and then build everything together in the 3d-printed enclosure.\n\nThe kit includes:\nRaspberry Pi Zero 1.3 (without Wifi or Bluetooth chip), GPIO-header already soldered\nDisplay-Hat with joystick and buttons\nCamera\n64GB MicroSD card\nMicroUSB to USB-C cable\n3D printed enclosure\n6 printed templates for self-drawn QR-Codes\n",
  "logo": "https://pretalx.riat.at/media/39c3/submissions/UZPXRN/Make-Your-Own-Case_5rF3wqh.png",
  "persons": [
    {
      "guid": "d75564b2-9776-5e06-b8cb-ec17e16e6d5f",
      "name": "freerk",
      "public_name": "freerk",
      "avatar": null,
      "biography": null,
      "url": "https://events.ccc.de/congress/2025/hub/en/user/speaker_d75564b2-9776-5e06-b8cb-ec17e16e6d5f"
    }
  ],
  "url": "https://events.ccc.de/congress/2025/hub/en/event/detail/seedsigner-diy-bitcoin-signing-device-build-w_312i",
  "links": [],
  "origin_url": "https://pretalx.riat.at/39c3/talk/UZPXRN/",
  "do_not_record": false,
  "do_not_stream": null
}