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by EthanHeilman 2297 days ago
>When sites offer both, choose U2F. When sites offer TOTP only, use it.

This, 100%

In some sense TOTP, basically HMAC, seems like it would be harder to screw up than a public key system. RSA is amazingly hard to get right. I wonder if the order of preference should be:

1. U2F ECDSA/EdDSA

2. TOTP

3. U2F RSA ... Infinity. SMS 2FA

No idea where ECDAA [0] fits.

[0]: https://paragonie.com/blog/2018/08/security-concerns-surroun...