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Yubikeys support TOTP... https://www.yubico.com/support/knowledge-base/categories/articles/how-to-use-your-yubikey-with-authenticator-codes/ https://www.yubico

• nickik 10y ago
  TOTP requires an app, Yubico Authenticator.
  • daveguy 10y ago
    Exactly, and if you are going to use an app anyway, you may as well have the app keep the token.
    • nickik 10y ago
      I actually still use it because this was I can use somebody else phone or some other device if I need to. That has come in very handy before.