Quote from: n0nce on October 10, 2022, 08:24:16 PM

Quote from: cryptoplatz on October 09, 2022, 10:45:40 PM

And yes, you can do all operations offline, airplane mode for example (we recommend this on app)

Oh, that's a terrible idea of an 'offline computer'. Whatever device you use for any such endeavor, should be either booted off a live drive (CD or USB thumb drive) or destroyed / at least fully erased after the process, and before any radios are turned back on.
How do you think criminals attack your device? Do you think a short downtime erases any viruses or spyware? Keyloggers and screenloggers continue logging - whether you're connected to the internet or not, and just do the telemetry when network connection comes back.

It's a little bit disturbing that 'turning on airplane mode' is what springs to your mind when I talk about entering a seed phrase only on airgapped machines.

In my opinion, the app should not even exist and the NFC transceiver should come by default. You could provide a modified version of Tails with NFC drivers and your own software preinstalled; though do make sure that it's all open-source, with reproducible builds.

I'm slightly worried about the NFC device though: where you source it, whether it's trustable. Though I suppose if it's not plugged into anything other than the live-USB-booted computer, there's no way for it to do telemetry.

Quote from: cryptoplatz on October 09, 2022, 10:45:40 PM

You need to decide what is better, leave your current seed only on paper or type the seed on CryptoPlatz App to save encrypted on the card, offline.

I'll be straight honest to you: Paper looks like the way better option here. Less fancy, but more simple and secure.

Have you used before Ledger app, Trust wallet app, Exodus app? All of this apps you use online on iOS or Android, and this apps ask you to save the seed on paper.

The option that we are offering, is to save the seed encrypted and keep offline using open source app, with a industry standard chip NTAG424.