> The key is in possession of the judicial system. It can only be decrypted and examined with a warrant, with probable cause, as you would need for wiretapping
That's how you end up with the NSA and CIA being inside every single camera in the country :)
For practical purposes, yes. The leaks showed how NSA has built a multi-layered data harvesting-archiving-searching machine that works not only through compromised hardware (including cameras), but also big company infrastructures, phone/email/SMS/internet browsing records and content, fiber optic cable tapping, hacking, installing bugs, spying and more.
If the camera itself is not bugged, it likely is harvested at another step at some point and nothing's more clear that if NSA wants to see what a camera sees, they are able to tap it if needed. Sure, untapped cameras exist, but it doesn't really make a practical difference. The NSA will still have your information if it wants, and likely already has most of it.
I don't know how long the records persist, but presumably for things like video surveillance footage the decay period would be quite fast. For full-text contents, less speedy but still fast. I can only truly envision long-term collection and storage of metadata - and even then, it's a big question how much is feasible and reasonable to store indefinitely.
It's likely that for your security camera footage to be accessed you would have to be targeted. It's likely that such targeting would only affect footage in the future or very recent past. But I'd grant that pervasive attackers can probably capture exponentially-decaying single video frames from millions of cameras if they were appropriately motivated, and those single frames could go back quite far.
The real problem here is the existence of such a system creates a kind of panopticon [0], with chilling effects not only on activity and discussion contrarian to the current administration, but also any future administration that may have access to electronic surveillance records. Without knowing how long records are kept, it is quite plausible that a future authoritarian state will misuse past records to target civilians.
The people don't care that they're being watched. That's the main lesson I took from the snowden leaks. I think most people might even like it because they think it means there will be less crime.
That's how you end up with the NSA and CIA being inside every single camera in the country :)
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