So, if there's code on the device that's computing these hashes then it can be extracted. Afterwards it should be possible to add changes to a inocent picture t

So, if there's code on the device that's computing these hashes then it can be extracted. Afterwards it should be possible to add changes to a inocent picture to make it produce a target hash. Getting a hash should pe possible too, just find a known pedo image and run the extracted algorithm. It's only a matter of time until someone makes this