When I use a web service, I expect my data to be collected by the service, especially if it is free of charge.
A device I own should not be allowed to collect and scan my data without my permission.
A device I own should not be allowed to collect and scan my data without my permission.
It's not scanning; it's creating a cryptographic safety voucher for each photo you upload to iCloud Photos. And unless you reach a threshold of 30 CSAM images, Apple knows nothing about any of your photos.