Only use security keys as 2FA method

[Enc]

Security Keys like YubiKeys are not a gimmick. They are meant to increase security by replacing less secure methods of 2FA.

The current process at dropbox forces me to have an SMS key or Authenticator app to use 2FA. Even when I add security keys SMS/Authenticator can not be removed. Therefore I cannot replace the less secure method with Security keys. Subsequently, security is not improved or even reduced, by allowing more methods.

The suggestion is to allow only e.g. two security keys and disable all other 2FA methods. This ties the account to physical tokens and makes exploitation of access impossible.

[Nancy]

Thanks for your suggestion, @Enc. 

Just a clarification; do you receive the 2FA code via SMS/Authenticator app, even if you add a security key as a 2FA method?

Let me know, and we'll take it from there.

[Jay]

Hi @Enc, are you available to respond to my colleague's message earlier?

[Enc]

I can choose what I can use as 2FA method. But I would like to get rid of the less secure method of SMS and only have security keys available. 

I am not receiving an SMS if I didn't choose. But an attacker that is able to intercept the SMS can choose the SMS during his authentication.