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Good thing TOTP is an open standard, so there are some alternative apps available. I guess they consider TOTP as legacy and are focusing on U2F, I think in the

Good thing TOTP is an open standard, so there are some alternative apps available. I guess they consider TOTP as legacy and are focusing on U2F, I think in their products you can’t even sign up for TOTP based 2FA anymore. I amassed quite a collection of U2F Titan security keys that Google gave away for free at conferences, some of them have become obsolete already though and some had serious security issues (the Bluetooth one). I prefer using the Yubikey for that reason, though I find them quite a bit overpriced.

nucleardog 7y ago
You can still sign up, but it's a bit of a pain. When you initially enable 2FA, you won't be given the option. But you can register with SMS/U2F/etc. Once you've enabled the first authentication method, you can go into your 2FA settings and add a virtual 2FA device. Once that's done, you can go back and delete whatever you added initially to be left with only a virtual 2FA device.