@phl @ErikJonker @dukeboitans @pojntfx Android Device Attestation does not need an account, if I am not mistaken. There is a similar problem though, namely that you cannot backup your keys if they are linked to the device. If you lose access to your phone (stolen, lost, broken,...), you loose access to the key, and might need to re-register if you don't have a second device linked to your ID.