I have all Reolink cameras and they’re awesome. They have both indoor and outdoor cameras. They’re really expensive compared to other similar cameras, but the software is really good, and there’s no subscription. You don’t even need to log in. Everything is only stored locally, on either SD cards in the camera or a separate “home hub” (or both). They have motion and object detection built into the cameras.

The way I have them set up is every indoor camera is plugged into a smart outlet that disconnects their power through Home Assistant when either me or my wife are home.

The outdoor ones are connected to solar power, so I didn’t even have to run any wires.

I’d highly recommend them.

Safe, yeah. Private, no. If you want to verify whether a user is a real person, you need very personally identifiable information. That’s not ever going to be private.

The best you could do, in theory, is have a government service that takes that PII and gives the user a signed cryptographic certificate they can use to verify their identity. Most people would either lose their private key or have it stolen, so even that system would have problems.

The closest to reality you could do right now is use Apple’s FaceID, and that’s anything but private. Pretty safe though. It’s super illegal and quite hard to steal someone’s face.