Encryption doesn't need to last forever, just long enough to be scrutinized. Once a trusted individual is convinced that a certain camera took this picture at

Encryption doesn't need to last forever, just long enough to be scrutinized. Once a trusted individual is convinced that a certain camera took this picture at this time and location, then that authentication is forever. Maybe that trust only includes devices built in the past 5 years, as hacks and bugs are fixed. Or corroborating evidence can be gathered; say several older, "potentially untrustworthy" devices take very similar video of an event. As with most things, the primary issue is not really a technical one. People will believe fake photos and not believe real ones based on their own biases. So even if we had the Perfect Technology, it wouldn't necessarily matter. And this is the reason we have fallen into a dystopian feudalistic society (we aren't teetering). The weak link is our incompetent collective human brains. And a handful of people built the tools necessary to exploit that incompetence; we aren't going back.