[meindnoch]

>Apple devices can query your AirTag's location because they sync its shared secrets through the iCloud keychain

I see. But can't Apple simply read this data from my iCloud keychain? Or is this kind of data sharing through iCloud keychain e2e encrypted?

[malmeloo]

As far as I understand, the keychain is indeed e2e encrypted and it requires at least one of your other devices to be online in order to sync. However last time I checked Apple still fails the mud puddle test, so there does have to be some kind of master key that decrypts the data in the case of account recovery.