3 ms·
That sounds a lot like what https://www.random.org/ https://www.random.org/ does to create random numbers.
by chipuni 5y ago
That sounds a lot like what https://www.random.org/ https://www.random.org/ does to create random numbers.
- rrauenza 5y agoPerhaps -- I can't find their description behind the process and I'm now curious about the math behind it. I think they would take a series of 0's and 1's.. 0010001110100100011 ...and map that into 0's and 1's based on the changes, not the numbers themselves. Maybe like 00 or 11 mapped to 0 and 10 or 01 mapped to 1? I can't recall.
- denton-scratch 5y agoThis sounds like the Von Neumann Extractor. https://en.wikipedia.org/wiki/Randomness_extractor https://en.wikipedia.org/wiki/Randomness_extractor It's purpose is to remove bias: the propensity of physical random processes to produce more 1s than 0s (or v.v.). Unlike some whiteners (AES?) it can be implemented with a handful of gates.
- rrauenza 5y agoYes, that's it. And it's used to eliminate bias. I found a good explanation at https://www.youtube.com/watch?v=xquB4rDbsvc https://www.youtube.com/watch?v=xquB4rDbsvc at about 14min.
- chipuni 5y agorandom.org definitely uses that process. See: https://www.random.org/statistics/source-purity/ https://www.random.org/statistics/source-purity/