I have done an analysis. It would cost about $5000 to perform a supply chain on a Coldcard at most, and that is the fixed cost. The per device cost is something like $25. There are multiple vectors to conduct a supply chain attack on a Coldcard and there are no defenses possible against it. The s...

i had one of these. only worked with nunchuk wallet. the whole industry of security hardware devices is pretty piss poor. i have a couple of yubikeys but they are, quite frankly, trash. useful but most of the functionality i can't use, or it just isn't actually secure.