I have read that the University of Chile uses seismic data to produce random numbers. (https://random.uchile.cl/randomness-beacon). Does seismic data real have randomness and if it so, which information is used in seismic data: magnitude, time, vb.?
This quote is from the article:
Use of Local Entropy: after collecting data from the external sources, it is necessary to generate entropy locally. For that, we use our own TRNG (True Random Number Generator), a piece of hardware that produces random bits by relying on a quantum process on an electrical circuit. At every minute, the TRNG generates a 512 bit value.
I found the article confusing. They allude to seismic data being used but the quote from the article suggests that the random number is generated using hardware that generates the random number based on quantum mechanical processes.
The article also mentions the use of cryptography. Perhaps the daily seismic data (which is essentially unpredictable), is used as a seed for the cryptography.
Any unpredictable source that can contribute to numerical entropy is a good source for trying to generate truly unpredictable random numbers. People even use the somewhat unpredictable timing of how long it takes to access data on a disk drive as a source of randomness. Generating truly random numbers is an impossible task. That does not mean that
/dev/random and all of the sources that feed it are not a good start. They are. Similar concepts exist on other operating systems. In general, the more entropy the better.