4 ms·
It’s more useful to take a sensitive detector and crank the sensitivity to maximum and put it in the dark. The randomness inherent in high iso noise on a cmos c
by techdragon 5y ago
It’s more useful to take a sensitive detector and crank the sensitivity to maximum and put it in the dark. The randomness inherent in high iso noise on a cmos camera sensor is actually quite random. Adding actual stars to it might only decrease the randomness you might be able to see from the night sky without a telescope, in this case a radio telescope.
- lisper 5y agoThe source of your randomness matters much less than insuring that your adversary doesn't have access to it, and that you collect enough entropy from it. As long as you have a good lower bound on the amount of entropy per unit time that your source generates, and the source is secure, the physical details of the source don't really matter.
- mkr-hn 5y agoCamera sensors have the same amount of noise regardless of ISO. It's just that bigger or better-engineered sensors have less noise period, so less is revealed as you raise the gain (ISO). I might have written a little about this: https://ko-fi.com/post/What-the-heck-is-ISO-A-sensitive-question-A0A56H3VN https://ko-fi.com/post/What-the-heck-is-ISO-A-sensitive-ques... The ideal for this would be an old sensor with lots of noise since anything new would have very little visible at any ISO. Maybe even the sensor in the camera they use for the lava lamps! A lava lamp has the benefit of being fully analog. There's no way to exploit it to make it predictable without physical access to mess with the chemistry to make the blobs stop moving around, and you'd have to do it to all of them without anyone noticing the blobs stopped blubbing. The camera on it 24/7 would make this a bit hard.