https://techcrunch.com/2021/08/05/apple-icloud-photos-scanning/

Later this year, Apple will roll out a technology that will allow the company to detect and report known child sexual abuse material to law enforcement in a way it says will preserve user privacy.

Apple told TechCrunch that the detection of child sexual abuse material (CSAM) is one of several new features aimed at better protecting the children who use its services from online harm, including filters to block potentially sexually explicit photos sent and received through a child’s iMessage account. Another feature will intervene when a user tries to search for CSAM-related terms through Siri and Search.