[bberenberg]

Not sure how this kind of thing works given that metadata can be stripped. Would love if the article further explained that side of things.

[firedaemon]

I think the idea is simply that you can prove authenticity if you have the metadata. You can’t prove authenticity without metadata, nor can you prove “inauthenticity” without metadata.

[hooverd]

It's like a signed message. The image is the clear text. The point is verifying authenticity.