Nope, just tested. There are hardware OTP devices that have no Internet connectivity. As far as I know, all OTP protocols are offline-friendly.
Comment on Vaultwarden selfhosting, or bitwarden service?
Schlemmy@lemmy.ml 3 weeks agoBitwarden does my OTP as well. You don’t need the servers for that?
koala@programming.dev 3 weeks ago
irotsoma@lemmy.blahaj.zone 2 weeks ago
It you’re talking about TOTP exclusively, that only needs the secret and the correct time on the device. The secret is cached along with the passwords on the device.