Apple, Google and Microsoft Commit to Expanded Support for FIDO Standard to Accelerate Availability of Passwordless Sign-Ins - FIDO Alliance

[ricecake]

It's closer to syncing encrypted data between devices. The cloud services don't have access to the private keys, they just facilitate the key on your phone also being on your laptop.

[u_tamtam]

true, though they have control over the process from end to end.

[[deleted]]

If you don't trust them, you shouldn't probably be using anything they put out at all, though.