Even with digital signatures, there are limits to what we can really verify. We'll likely be able to verify whether an entity is a real human, using some kind

Even with digital signatures, there are limits to what we can really verify. We'll likely be able to verify whether an entity is a real human, using some kind of "proof of humanity" system. We will have cameras/mics with private keys built-in. The content can be signed as it's produced. But in this case, what's stopping me from recording a fake recording? Maybe it's a non-issue. We used text to record history and we've been able to manipulate that since, well, forever.