I have already said, it's done by establishing trust by tying identity to images. Your assertions aren't a counter to that. You thinking they are shows a lack of understanding of how to verify truth on a fundamental level.

Let's also list the points you have conceded by quietly giving them up:

1. Hacking the camera is irrelevant.

2. Images can be verified.

Do you want to actually engage with the conversation? The funny thing is that there are engineering challenges in this space, but you don't seem to understand the basics well enough to even get to that point.