I didn't know what CSAM stood for so I first though this would be the reaction to the security issues iPhones faced. Oh, silly me.
Additionally, by calculating hashes of media on peoples devices, you can quickly determine networks. A private image you shared with your friends? Unique hash and everyone that has it is probably in your network. That is aside from the issue that they would also just read your contacts.
I didn't know what CSAM stood for so I first though this would be the reaction to the security issues iPhones faced. Oh, silly me.
Additionally, by calculating hashes of media on peoples devices, you can quickly determine networks. A private image you shared with your friends? Unique hash and everyone that has it is probably in your network. That is aside from the issue that they would also just read your contacts.