> First I've heard of this. Do you have some links where I can read more about this? Sure, the comparison table on the Nitrokey site[1] is probably sufficient.

> First I've heard of this. Do you have some links where I can read more about this? Sure, the comparison table on the Nitrokey site[1] is probably sufficient. Anything without a green tick next to "tamper-resistant smart card" is a software implementation with the associated risks (e.g. firmware updates are available[2] - i.e. if you can update the firmware then you've also got a low-level attack vector for miscreants). Meanwhile all YubiKeys are hardware backed and it has never been possible to update firmware on them. [1] https://www.nitrokey.com/#comparison https://www.nitrokey.com/#comparison [2] https://www.nitrokey.com/releases https://www.nitrokey.com/releases