[diggernet]

> So what exactly is being transferred with this new cross platform mechanism? Isn’t it the same private key, except that it’s a direct device-to-device transfer?

The sentence you quote is describing passkeys, not this new transfer mechanism. I assume this does transfer the private key.

Oh the other hand, while the article is short on details, it sure sounds like this only supports a move operation, where the passkey is removed from the first device and installed on the second. Which means it'll so nothing for disaster recovery, because they are still assuming your one passkey device will always be present and functional. For example, say your iPhone is smashed and you decide to buy an Android replacement. Nope, sorry, first you need to buy an iPhone to restore from iCloud, then you can transfer to Android.

It really needs to be possible to back up passkeys, no matter how much the advocates say we shouldn't be allowed to do that.