Comment by xoa
15 hours ago
>EXIF data is stripped for a good reason - because it can be a privacy hazard. Suddenly this plays no role anymore?
Can you clarify what your actual complaint is here? Putting aside for a second obvious implementation options, it's pretty standard that there can be a tradeoff between privacy and trust. Any of us are still perfectly free to upload images for fun to forums or social media or whatever that are private, or edited or whatever we like. But if there's something we [i]want[/i] to prove, this gives an extra option to do so. And in particular the set of cases where one cares the most about enhancing authenticity appears at first thought to be pretty much a union set with the cases where one will put their name (or at least the location and time of the picture in question) behind the image? Like, can you give examples of specific cases you are imagining where simultaneously the photo itself reveals no information about time and location [i]and[/i] it's something local/national/international-newsworthy where people would fear AI-alteration? Like, say you're photographing at a protest to document it including any violations of law. By definition, the images you take reveal the location and the time. That's the whole point of them. Having the location and timestamp signed wouldn't reveal anything extra as long as the photo was unaltered.
And actual legit journalism always has name(s) standing behind the reporting. Or for that matter, even if we're merely talking something like a review of a product, is it actually wrong to put a name or pseudonym behind that review if you expect readers to give you much credence? I mean, you'd be free in terms of law and tech to not bother. But even long before the current growing AI-slop age a lot of us have been starting to treat anonymous reviews with a lot of skepticism, or discounting them entirely for some product classes, for good reason.
Even in terms of maintaining privacy, remember we already have "tools" for that which this in turn could further help. You could privately report a tip to a reporter at a media organization, and then they could report on that without revealing you but be able to say "we verified the signature of the raw image and sensor data" alongside normal follow up. Then it's their name, but having a stronger chain behind it could still be helpful in places.
Finally getting back to "implementation options", there's no technical reason the image and multiple sets of metadata can't all be signed separately by the sensor stack such that you can pick & choose what to include and still have it all be signed, with readers giving greater or lesser weight to the trust based on your choices.
I think what got me worried is the GPs take that "I expect in the near future all digital cameras to digitally sign the images they take". Sure, if you have your special, verification-enhanced camera, go for it. But if this goes like with smartphones and we have all cameras embedding such a signature - and therefore all cameras are made locked-down and tamper-resistent - then we have another category of devices removed from control of their users.
> Any of us are still perfectly free to upload images for fun to forums or social media or whatever that are private, or edited or whatever we like.
First, the paper proposed a method of embedding the metadata inside the actual image pixels in a way that makes it difficult to remove. I think it's still possible, but you're will need a specialized tool to do so and it will alter the image.
Second, that's assuming forums or social media would still be allowing uploading unsigned images. If AI images really become as much of a problem as anticipated here, then sites might decide to block any image they can't verify completely.
> Like, can you give examples of specific cases you are imagining where simultaneously the photo itself reveals no information about time and location [i]and[/i] it's something local/national/international-newsworthy where people would fear AI-alteration?
All kinds of photos from warzones have this property. We wouldn't have an entire science of geolocating photos from landmarks that were accidentally captured if everyone was so easy with putting their GPS coordinates in the file.