@JeffSchaller I read about a new project that just uses the camera noise from a webcam and doesn't even need lavalamps to look at

@jesse_b "The webcam is pointed at you, but don't worry - we're only using the noise from it, not the image" -- NSA

@SottoVoce It actually relies on the webcam being covered and then the contrast increased to create the noise

@jesse_b That's what the NSA tells us, at least. ;) (I'm kidding around)

Those are interesting, but all you need is a few hundred keystrokes to generate a random seed. And if you have a big company or an embedded system, you can usually have an HWRNG in it to create that seed.