It can be more transparent to scan on users devices, which are in the possession of the public, than it can be to scan through user dat in the cloud, which is h

It can be more transparent to scan on users devices, which are in the possession of the public, than it can be to scan through user dat in the cloud, which is hosed in private and controlled "black box" data centers. This can be a step forward for user privacy and auditability, if Apple plays it that way.