"u/C0Y0T3Z is permanently banned from r/Buttcoin"

They run that ship tight. If you don't hate Bitcoin to the point of jerking off to 1% declines, you are far from welcome

Being banned from there is legit a badge of honor. Fkin hacks

Hey r/Bitcoin,

I’ve been working on an open-source side project called SignerOS for the last few months, and I thought I’d share it here and get some feedback.

The idea started with a pretty simple question: Can I turn a regular PC into a simple, dedicated Bitcoin signing device without having to build a hardware wallet?

I wanted something that would boot from a USB stick, have no network connectivity at all, run only the software needed for creating wallets and signing PSBTs, and leave nothing behind when you shut it down.

So that’s basically what SignerOS is.

It’s a minimal, air-gapped live OS built with Buildroot. It runs entirely in RAM and is intentionally stripped down:

• No Wi-Fi or Ethernet drivers
• No network stack
• No unnecessary services or daemons
• No persistent storage
• Only the software needed to create a wallet and sign Bitcoin transactions

You boot it from a USB stick, do whatever you need to do, shut down the machine, and there’s nothing left on the computer.

The whole thing is open source, including the Buildroot configuration, build scripts, and source code.

Docs and the project page: https://signeros.github.io/signeros/

I’m mainly sharing this because I’d really like some criticism from people who know more about Bitcoin self-custody and air-gapped setups than I do.

If you have time, take a look at the architecture or build it yourself. I’d especially appreciate someone trying to find holes in the security model or pointing out things I’ve overlooked.

It’s still a work in progress, so I’m also open to suggestions about what should be added, removed, or done differently.

(Referring to prebuilt versions.)
While I do not own one (yet) myself, I keep wondering: since it has only volatile memory, the seed needs to be entered every time, through QR scan. That in itself is a huge risk. I would not want such a risky QR code laying around.

Is the version with the card reader better? It would allow for encrypted storage of my seedphrase.