It’s not that simple. It’s not just a “this is or isn’t AI” boolean in the metadata. Hash the image, then sign the hash with digital signature key. The signature will be invalid if the image has been tampered with, and you can’t make a new signature without the signing key.
Once the image is signed, you can’t tamper with it and get away with it.
The vulnerability is, how do you ensure an image isn’t faked before it gets to the signature part? On some level, I think this is a fundamentally unsolvable problem. But there may be ways to make it practically impossible to fake, at least for the average user without highly advanced resources.
We aren’t talking about current cameras. We are talking about the proposed plan to make cameras that do cryptographically sign the images they take.
Here’s the link from the start of the thread:
https://arstechnica.com/information-technology/2024/09/google-seeks-authenticity-in-the-age-of-ai-with-new-content-labeling-system
This system is specifically mentioned in the original post: https://www.seroundtable.com/google-search-image-labels-ai-edited-38082.html when they say “C2PA”.