Mike Dilger ☑️ on Nostr: I'd like to have an offline master key. For Mosaic, this would still be required to ...

I'd like to have an offline master key.

For Mosaic, this would still be required to sign my relay list (server list) and sign device keys and again anytime those things change.

Moving the data around on a USB stick is feasible but annoying. I quite like the seed signer and using QR codes and cameras to move data around.

So I'm writing an android app that I will run on a disused android phone that I disable as much as possible (no SIM, no WiFi password, airplane mode, flashing the modem with zeroes). Yes of course the far-side of the modem pinging the towers is not something I can disable.

Still it could be attacked from the cell tower. Not likely but completely possible.

Unfortunately I haven't found any good handheld computers with cameras, without networking, and running linux. My Librem 5 spontaneously hard crashes and reboots after less than an hour of usage, else I'd try that.

Maybe I should just pull the seed signer code, add what I want, and use my seed signer.

Anyhow, the code I'm writing is with Dioxus that targets a lot of platforms: linux, macos, windows, appimage, web, ios, and android.