New research from the University of Waterloo's Cybersecurity and Privacy Institute demonstrates that any artificial intelligence (AI) image watermark can be removed, without the attacker needing to know the design of the watermark, or even whether an image is watermarked to begin with.
If the hash can be created at the time the inage/media is created then it can be faked.
Depends on the hash - some are tracable to a crypotographic public key and thus cannot be faked. Most are not but there are options that can be. Normally we refer to such things as signed not a hash but same thing to the layman who doesn’t understand this.
In order for it to be traceable with a public key, it needs to be signed with the private key. That means the private key has to be on the camera. That means it can be extracted from the camera and leaked.
Maybe. There are ways to assign a private key that is not easy to extract. a chip that creates a private key on first poweron and then saves to internal memory for example.
Not easy to extract sure, but is it secure enough for you to claim that it hasnt been leaked and so forms a secure chain of custody? Once one has been leaked then that can be used to sign any fake pictures you like. I woudnt buy that for anything for serious than is this meme picture real.
There are ways to be sure of authenticity, ways that can’t be faked.