Interesting. What is the value of a microservice that generates random numbers over just using a language's SecureRandom equivalent?
I'll leave this in case some find the links interesting:
For someone like DigiCert I imagine they could ensure a much higher quality source of randomness, ie multiple different hardware sources like the avalanche noise of semiconductor junctions[1], cosmic rays[2] or lava lamps[3].
It's also easier to ensure the random numbers used are of good quality when you have a single source, ie you can collect statistics as they're served.
[0]: https://bugzilla.mozilla.org/show_bug.cgi?id=1910322#c17
[1]: https://ieeexplore.ieee.org/document/10295491
[2]: https://nyuscholars.nyu.edu/en/publications/muon-ra-quantum-...
[3]: https://blog.cloudflare.com/lavarand-in-production-the-nitty...