It sounds like a contract between the sender and the receiver of the images, much like an NDA.
Edit: the problem there is, if something under NDA finds its way into public view, and there are several different parties that could have leaked it (i.e. the leaker 8s not identified), what actions can then be taken? It's pretty much unenforceable at that point to anyone who didn't sign the agreement. Hence the need for this new system, I guess.
Sorry, I was referring to the case of publicly published images that the author/subject no longer wishes to be public. E.g. A person posts nude images on OnlyFans, and later regrets it. I think the case where someone transmits such images in private, and then they are leaked, is exactly what this tech. is designed for.
Edit: the problem there is, if something under NDA finds its way into public view, and there are several different parties that could have leaked it (i.e. the leaker 8s not identified), what actions can then be taken? It's pretty much unenforceable at that point to anyone who didn't sign the agreement. Hence the need for this new system, I guess.