Furthermore, plenty of platforms will remove EXIF data. I made a LaTeX equation rendering script that embedded the source LaTeX in EXIF data, the idea being t

Furthermore, plenty of platforms will remove EXIF data. I made a LaTeX equation rendering script that embedded the source LaTeX in EXIF data, the idea being that you could edit the equation after the fact without having to save the source. But practically every tool I used would strip the EXIF data - so I moved to storing the source in the least significant few bits of the pixel values. This worked much better with the places I was uploading the images to (google docs mostly). Obviously fragile to image format conversion though.