The key here is scale. If the only trigger for action is having (say) a few hundred matching images, or a dozen from the same known set of offending pictures, t

The key here is scale. If the only trigger for action is having (say) a few hundred matching images, or a dozen from the same known set of offending pictures, then I can see how apples “one in a trillion” claim would work. Also, Apple could ignore images from the device camera - since those will never match. This is also in stark contrast to the task faced by photo copyright hunters. They don’t have the luxury of only focusing on those who handle tens of thousands of copyrighted photos. They need to find individual violations because that’s what they are paid to do.