Yubikey and NitroKey offer NFC and non-NFC versions of their flagship hardware security tokens (HSTs).
NFC is convenient, but can under some circumstances send e.g. challenge-response exchanges in clear text.
Smartcards using RFID, a similar though not identical protocol, can be queried from ~100cm away.
- Are there other ways are NFC HSTs are known to be more risky than their non-NFC counterparts?
- Should users store NFC HSTs in RFID-blocking pouches, like those used for wireless car keys or contactless bank cards?


not an expert on this but i would imagine a Faraday case for it, perhaps with a little flap for ease of access would work?
I would also hope a security company making hardware keys would be aware of and avoid the sending in clear text, as it would be a major vulnerability. Then again, ive never trusted a company to do anything beyond what is absolutely necessary to stay afloat.