@clarfonthey @joepie91 That's going to depend.
I suspect a large portion of the infineon catalog is impacted, so it depends on the implementation. Yubikey does have the funding to do things like "we wrote our own, and have an extensive cryptographic test suite", where open source may not.
Yubikeys are tamper evident in the face of this attack. An open source one may or may not be.
I guess the real question is: can this kind of em attack be made to work through potting?