Two locks are better than one lock, right?🔒 And the same should apply for your online account credentials! That's why 2FA, like U2F, stops >99% of automated account attacks.

Find out more on why you should use U2F 👉

https://tuta.com/blog/why-u2f-is-important

@Tutanota Android does not supports security keys by default, you need google play services for this 😮‍💨
@blueluma @Tutanota Not true actually, you can download Authnkey from fdroid that provides the "UI" needed for hardware passkeys to work without google play services. https://github.com/mimi89999/Authnkey
Hopefully this helps!
GitHub - mimi89999/Authnkey: Passkey credential provider for hardware security keys

Passkey credential provider for hardware security keys - mimi89999/Authnkey

GitHub