This is a start. It can even be done steganographically, embedded in the picture in a non-visual way, which is robust against compression and "social media laun

This is a start. It can even be done steganographically, embedded in the picture in a non-visual way, which is robust against compression and "social media laundering" (term of art for uploading then downloading from social media). The problem is people just don't care. See "cheap fakes" like slowing down a video of Pelosi and claiming she's drunk. People actually believe that garbage. No amount of fancy math can fix that.