It uses cryptographic signatures in the cameras and tools. Say you take a photo with a compatible camera, it gets a signature. Then you retouch in Photoshop, it gets a another signature. And this continues through however many layers. The signature is in the file’s EXIF data, so it can be read on the web. Meaning a photo on a news site could be labeled as authentic, retouched, etc.
Edit: Doesn’t require Adobe tools. Adobe runs the services, but the method is open. There are cameras on the market today that do this when you take a picture. I beleive someone could add it to GIMP if they desired.
It uses cryptographic signatures in the cameras and tools. Say you take a photo with a compatible camera, it gets a signature. Then you retouch in Photoshop, it gets a another signature. And this continues through however many layers. The signature is in the file’s EXIF data, so it can be read on the web. Meaning a photo on a news site could be labeled as authentic, retouched, etc.
Edit: Doesn’t require Adobe tools. Adobe runs the services, but the method is open. There are cameras on the market today that do this when you take a picture. I beleive someone could add it to GIMP if they desired.
GIMP is open source, could someone then just tell it to sign anything?
Only with their private key.