Did they just announce the ultimate solution to image authenticity online?

Instead of proving some image on some platform is not AI or severely edited, we can simply prove it was original by verifying unforgeable signature made by a camera / microphone baked into each image produced by it.

And of course in future it could be done for video and audio! This would be absolutely HUGE!

> that image shared online is original and unedited?

The image data the sensor physically receives passes through a ton of processing steps before the image lands in your phone. If there is some watermarking/signature doing on, on the image, it'd be that the device at that moment capture that data, not that it's not AI, or not edited, or "truthful" or whatever. That's still an unsolved problem to figure out.

From what I understand, the feature renders a signed reference image from raw sensor-data "alongside the final image".

Still no solution if the image posted online is not that reference image or that reference image is actually a photo of an AI picture.

Isn’t that done by EXIF like decades ago? Not on phones but DSLR. I would think it’s an easy software thing to add (and probably to remove)

It is a very old idea. But it matters a lot in iPhone’s scale. Many people will have it without buying a separate device.

The underlying tech is already compromised on the Android side.

https://lobste.rs/s/4netv1/c2pa_cameras_do_not_survive_conta...