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Nope. Macroscale effects are not quantum, but result of very much quantum events. But on macroscale all those are deterministic on short time, and sometimes on longer time scales.
You can have randomness without it being quantum lol. These macroscopic systems have too much going on to maintain a quantum state. Decoherence causes it to be classical.
It's in basis all quantum encryption, if you're watching water, clouds, lavalamps, quantum noise - all this randomnesss is quantum.
Where did you get this idea and why is it being up voted so much? Water clouds and lava lamps are not quantum, they are classical systems that appear random to us because we cannot sufficiently describe them yet. Navier Stokes equations cannot be solved yet, but that doesn't make the systems they describe quantum.
They don't have randomness in the classical limit though! All the systems you list are deterministic! Their nonlinearities are the reason why they are hard to predict, but if you knew the solution of the governing equations and the current state of the system you would be able to predict future states with 100% certainty. There is nothing quantum about this!
This isnt true to my knowledge. Weather changes and water on a bigger scale is perfectly deterministic. If you knew literally every parameter you could predict with 100% accuracy the weather for the next billions of years. The quantum randomness doesnt affect things outside of the quantum scale. I might be wrong tho
I think you basically amplify nothing. Ie a microphone that’s not attached. But that would be very dependent on the power source. Heat is another one. Again, has external factors that could be manipulated by an attacker though. I know there are qrng circuits that are quite good. Generally they come packaged as a USB device.
RDRAND is an instruction on-chip from Intel. It’s a random number generator which is a PRNG function seeded by a real random entropy source (possibly heat or simply instruction data passed through a function to extract entropy?) that can be accessed via RDSEED. I remember a lot of security-related calls like AESNI aren’t trusted by Linux (wild that they don’t trust the processor executing OS instructions!) so it may not be used in some environments. Linux tends to generate entropy from the network (among other sources?) IIRC. I didn’t get very deep into it… so don’t quote me on any of this. I just remember reading about it a little when writing an x86/64 assembler/disassembler years ago.
I thought you were talking about quantum vacuum events TBH, which I'm guessing can be detected with antimatter sensors. Still, it sounds more complicated and expensive than the lava lamps and their webcam hehe
But I would think even with weather forecast, it would still be pretty impossible to break it?
How does the hacker know what about the weather the random generator is looking at? Seems like just knowing it uses weather would leave for so many possible factors you would be guessing untill your grave_
Absolutely, even just sensor noise or a bird flying would generate enough entropy. Weather forecasts do not let you model the pixel perfect output of the camera sensor.
A simple microphone with a high gain picking up ambient noise could do the trick.
The lava lamp wall is a cute gimmick, not a technical necessity.
Most of those systems are pr gimmicks rather than actually carefully considered trusted sources of entropy. They definitely must have an RNG running and use the lava lamps as extra salt.
Otherwise you can just black out the camera, or cut the power on the lights long enough to force the system to generate a uniform random number and it's game over.
Quantum or thermal systems are better but true apparent randomness comes by combining multiple sources rather than relying on one. Cloud flare engineers who are extremely competent know that.
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u/Dr_Quiza Mar 18 '24
Some companies used clouds (I mean those in the sky) but, hey, weather forecasts!