Re:Show HN: GPG on macOS and YubiKey
by trishankdatadog on Wednesday November 13, 2019 @07:20AM
(#21523249)
We're aware of hardware vulns like ROCA (we used to check the exact version of the YK, now we support only the major version 5).
We're taking the risk anyway because the benefits of having the private keys generated and stored entirely on the YK is entirely worth it.
We're also not primarily using the YK to encrypt messages. If continuing to decrypt shared messages in the future is critical, I'd personally look into HSMs which offers key-wrapped backup.
Also I'd strongly encourage generating encryption subkey in software (offline, air-gapped machine) and then copying it to Yubikeys. If you lose your Yubikey (or mistype 3 times the PIN) you wouldn't be able to decrypt your secret data.