[dunham]

Yeah, last I checked, encrypted itunes backups would keep the "this device only" keychain data. Which would only work when restored to the same device - it needs the UID key from the secure enclave to decode. (I wrote code a few years ago to decrypt the rest of the keychain.)

At one point, google authenticator started marking its entries as "this device only". I don't know if they've backed off on that since then.