How does something like the U2F Zero[1] compare? As I understand it, the u2f zero acts as an HID device and not as a smartcard provider, but could one modify t

How does something like the U2F Zero[1] compare? As I understand it, the u2f zero acts as an HID device and not as a smartcard provider, but could one modify the firmware to do that? Isn't this basically an open source yubikey you can make yourself for < $25? 1. https://github.com/conorpp/u2f-zero https://github.com/conorpp/u2f-zero