Randomness test: https://en.wikipedia.org/wiki/Randomness_test
Google/paranoid_crypto > docs/randomness_tests.md > Tests: https://github.com/google/paranoid_crypto/blob/main/docs/ran...
"10 Tbit/s physical random bit generation with chaotic microcomb" (2023) https://news.ycombinator.com/item?id=38044587 ; without DRBG, too