But we agree that the bar for something non-naive is extremely high if you want to defeat the well-funded adversaries and whatever they come up with in the next few decades (future algorithms will be applied to today&#x27;s images). I&#x27;m sure they have nice libraries of the artifacts most cameras and compression algorithms <i>should</i> leave in any image and if it isn&#x27;t there, well, let&#x27;s look for some steganography?