To defeat this, all you need to be is a state actor with a database of child porn at your disposal (which is stored for exactly the purpose of training detectio

To defeat this, all you need to be is a state actor with a database of child porn at your disposal (which is stored for exactly the purpose of training detection systems). Then you run the hashing algorithm against images you know are in the database (Apple suggested that they would accept suggestions by some kind of multi-Country vote). Then you can pull out the hashes and figure out how to trigger false positives on the important vectors. Next, embed your images in sites of interest, like: * A meme in some group * A document or 'leak' * An email to a journalist Wait for somebody to save it to their Apply device. Wait for it to be flagged and then use that as 'reasonable means to conduct a search'. When asking for a warrant, the agency would say something like "we detected possible CSAM on a device, the likelihood of a false match is extremely low" - a judge will hardly press further. You now essentially have a weapon where you can search any Apple device in the name of preventing the distribution of CSAM. Failing that, you could just have `document_leak.pdf` and download a file that is both a valid PDF and a child porn image, depending on which program you open it with.