this post was submitted on 09 Sep 2023
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Cameras connected to the public internet are such a bad idea.
No it isn’t! - CIA
Wait, isn't every camera public? - NSA
Pretty much, yes. - Shodan user
Thanks
Agreed! -CCP
Wyze cameras phone home to China unfortunately.
There used to be a website with a map and you could see all these open unsecured cameras they'd found around the world. Mostly by searching Google for the page name they all had.
Some of them seemed intentional, like traffic cams, cameras on the roof looking out over the city, etc, but there were so many fat men sat around watching TV in their underpants, random families in the kitchen, and so on.
http://www.insecam.org/ is still alive!
Funny that the website shedding light on insecure cameras is, itself, insecurely serving the public over http.
Well. At least in Finland all cams are deliberately public.
Nobody watching TV drunk in their underpants. Thank god.
It would be fine if the footage was end-to-end encrypted, meaning you need to transfer the encryption/decryption keys from device (e.g. a phone) to camera, and then manually between all devices that should have access to the decrypted footage.
Camera would only ever send out encrypted footage, and thus it would be insufficient to have access to the cloud account if you want to view the footage - you would need both access to the account (to obtain the encrypted data) and the decryption key (to actually decrypt it). The decryption key must never reach any 3rd party servers and can only be manually transferred between devices that should have access.
There are still possible attack vectors, like malicious firmware updates, or the viewer client app updates, but those are very difficult to exploit, and pretty much exist in most "secure" software today (including from companies like Google, Apple, Meta, etc.). They could be mitigated by hardware design (do the encryption in hardware, camera's software never has access to decrypted footage) and open source viewer clients that the user controls, but I would consider a camera sufficiently secure (for non-sensitive locations) without those.
How would I encrypt an rtsp stream so I can port forward it and then how to I unencrypt that stream for use on a local server?
I guess you wouldn't. Use a different protocol, one that supports the security you need.
Encrypted VPN between each side. IPSEC over GRE using 1024-bit AES encryption is more than enough.
Honestly though, if someones cracking IPSEC with any encryption against a random person then that's already leagues more than any script kiddie is capable of and professional hackers don't have the motive.
Just set up a VPN and transmit the video over that network. That's the easy method.
"how would I do something that is impossible because I think I'm making a clever point"
use a different protocol
It is a bad idea. On one hand, we have the mean to make them quite secure. There is no such thing as an unbreakable encryption, but with proper key management and using decent enough algorithms we can totally do something that puts your camera out of reach of most thing that are not nation-scale organisations. On the other hand, it's mildly more inconvenient than "installing an app and entering your email", as it might require stuff like doing a tiny little bit of setting up.
So, the unsecure/"trust the service" way it is.
What's the alternative to putting them on the pUbLic InTeRnEt? I pay my ISP $2000 per month for my own private commercial circuit? It's not a bad idea because there is no reasonable alternative. Risk mitigation is the key, as you seem to be aware.
There's certainly a middle ground between IOT cameras sending a constant stream out to an internet server and a completely private circuit.
First, let's put the NVR inside the network so that we aren't constantly broadcasting to the internet.
Then let's not allow direct access to the cameras from the internet. Instead, we connect to the NVR via a VPN.
You keep control of all the recording and storage infrastructure, and you don't place your trust in these corporations that have been found over and over again to be lying or overstating their security stance.
It's a bad idea because of the de-facto "requirement" that people want everything available everywhere with zero setup, causing cheap, completely insecure solution to become the norm. Just don't use "cloud-based, app-enabled zero-config ultra easy trust me bro I know what I'm doing" camera and get proper stuff that allows you to control what goes where and use decent encryption.
I’d argue that it’s more convenient to have clouds connect for recording and storage purposes but so many cameras come with SD cards built in now that the cloud storage isn’t even really an advantage anymore either.
A security camera with only local storage has a pretty obvious flaw that the incriminating footage can be more easily stolen and/or destroyed by the perpetrator.
DVR doesn't take up much space in the safe. And the heat produced helps keep humidity down.
Sure, but that's not a comparable alternative to the convenience of a turnkey, cloud solution. There's a reason they're so popular.