I would like to get a few random bits per day from nature (from chaotic physics, like rolling dice, or quantum physics, but not from cryptography) which Alice and Bob can measure independently from opposite sides of the USA. My first instinct is to measure emissions from the sun, or even other stars, but I have no idea what exact emission has strong variation and strong correlation across the earth. I'm aware of all the NASA satellite data, which could be used, but I'd prefer something with "theoretical flip-flop bistability". Does the galaxy flip any coins?

What's a practical (preferably cheap) recommendation? Does anyone already do this?

  • $\begingroup$ You mentioned Alice and Bob. That means you are interested in entanglement. What is your goal? Are you doing some project, or trying to investigate reality of entanglement? $\endgroup$ – kpv Oct 25 '16 at 2:12
  • $\begingroup$ Actually, Alice and Bob came from the cryptographic method. But, here my goal is a method where Alice and Bob don't need to speak. I am not interested in entanglement here. $\endgroup$ – bobuhito Oct 25 '16 at 2:59
  • $\begingroup$ How about counting or observing the position of solar flares> $\endgroup$ – mattfitzgerald Oct 25 '16 at 3:17

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