Hmm yeah fair point. I'm not sure you can do it without some control over the observer device then... will we have "authenticated cameras" soon, with crypto in secure elements? Feels like we'll have to go there to have any trust in video.
Hmm yeah fair point. I'm not sure you can do it without some control over the observer device then... will we have "authenticated cameras" soon, with crypto in secure elements? Feels like we'll have to go there to have any trust in video.
Not soon, we've had them for a long time. Here's one time one of those systems was hacked... 15 years ago. https://www.elcomsoft.com/news/428.html
It turns out if you give an adversary physical access to hardware containing a private key, and they are motivated enough to extract it, it's pretty hard to stop them.