Hardware RNG Entropy Sources
Discussions center on hardware and physical sources of true randomness and entropy for RNGs, including Lavarand lava lamps, RDRAND, radiation, and their cryptographic security, trustworthiness, and integration with software entropy pools.
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You might enjoy this: https://en.m.wikipedia.org/wiki/Lavarand
Could we use it as a source of "reproducable randomness"? For instance, use this as an RNG during game development?
Nope. Random.org could be compromised. XORing it with your /dev/random, plus a locally-generated randomness source would work though.
Would that be cryptographically secure? Couldn't someone perturb an RNG based on background radiation by beaming radiation at it?
If your can't trust your CPU, you are screwed - no matter what entropy source you use.
Why not mix rdrand with jitter entropy?
Could it be used as a source of entropy for cryptographic purposes?
Can you not just add salt to seed and make it true random? seems like under engineered solution to me.
All new Intel CPUs now contain a built-in true hardware RNG (RDRAND), why not just use that?Unless you think Intel might have put some kind of backdoor in it (hard to believe), in which case they could also be intercepting your USB communication with this device and substitute their own evil numbers.
Why don’t all computers provide a random hardware generator? Randomness is trivial in dedicated hardware..