Re: [Haskell-cafe] random library

The hash drbg from the drbg package should meet your needs. Deterministic, pure Haskell except the actual hash function. On Oct 10, 2017 8:13 PM, "Viktor Dukhovni" wrote:

...

On Oct 10, 2017, at 8:48 PM, Kazu Yamamoto (山本和彦) wrote:

Before the release, I would like to replace the random package since it is slow. I'm looking for a random library which is - fast - thread-safe (good for concurrent use)

Any recommendations?

Just to make it more interesting, I should mention that the RNG should be not just statistically random, but should in fact be crypto random (resist predictability through cryptanalysis when properly seeded).

So indeed there are two more issues here:

- Securely seeding the RNG (likely using the OS API for random seeds, and/or the RDSEED/RDRAND instructions on Intel CPUs), IIRC we can that from cryptonite, I hope at a reasonable cost.

- Choosing a suitable DRBG based on the seed. Likely again something from cryptonite.

Some time back I posted to the cryptography list about the soundness of relying on RDRAND in cryptonite's RNG (uses it instead of /dev/urandom and the like when available). The rough consensus IIRC was not rely solely on RDRAND. I never went back to write a PR to address that...

http://www.metzdowd.com/pipermail/cryptography/2016- November/thread.html#30859

-- Viktor.

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